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I get the error message in the Subject Line. So I looked at the discussion at
<div class=""><a href="https://github.com/openslide/openslide-python/issues/27" class="">https://github.com/openslide/openslide-python/issues/27</a></div>
<div class="">and carefully followed all the advice given there, but the error persists.</div>
<div class=""><br class="">
</div>
<div class="">bgilbert locked the topic on github in December 2019, saying that the problem was resolved. He also said:</div>
<div class=""><span style="color: rgb(36, 41, 47); font-family: -apple-system, system-ui, "Segoe UI Variable Text", "Segoe UI", Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji"; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class="">"This
is likely to be a problem with your installation, so I'll close. If you're still seeing this with OpenSlide installed in your library search path, please reopen.” </span><span style="color: rgb(36, 41, 47); font-family: -apple-system, system-ui, "Segoe UI Variable Text", "Segoe UI", Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji"; orphans: 2; widows: 2; background-color: rgb(255, 255, 255);" class="">I
don’t know how one can reopen a locked topic on Github. Perhaps this will do the trick.</span></div>
<div class="">
<div style="orphans: 2; widows: 2;" class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="caret-color: rgb(36, 41, 47); background-color: rgb(255, 255, 255);" class=""><br class="">
</span></font></div>
<div style="orphans: 2; widows: 2;" class="">
<div class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class="">I
thought the problem was that I installed openslide-python first, and openslide later, but I tried</span></font></div>
<div class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class="">sudo
port install openslide</span></font></div>
<div class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class="">first,
and that didn’t work.</span></font></div>
<div class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class=""><br class="">
</span></font></div>
</div>
<div style="orphans: 2; widows: 2;" class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class="">Here
is the command I gave to macports, and the response from macports.This seems to mean that openslide file(s) are installed, but is there a way of checking further, in particular checking that there is nothing wrong with the files?</span></font></div>
<div style="orphans: 2; widows: 2;" class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class=""><br class="">
</span></font></div>
<div style="orphans: 2; widows: 2;" class=""><font color="#24292f" face="-apple-system, system-ui, Segoe UI Variable Text, Segoe UI, Meiryo, system-ui, ui-sans-serif, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji" class=""><span style="background-color: rgb(255, 255, 255);" class="">From
the discussion on Github, it seems that the problem may be with Macports. I could (very reluctantly) delete my Macports installation and reinstate it. Does anyone have some wise advice?</span></font></div>
<div style="orphans: 2; widows: 2;" class=""><br class="">
</div>
<div style="orphans: 2; widows: 2;" class="">
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">$ port search openslide</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">openslide @3.4.1_1 (graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> A C library for reading virtual slides.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py27-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py34-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Obsolete port, replaced by py35-openslide</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py35-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py36-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py37-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py38-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py39-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">Found 9 ports.</span></div>
<div class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><br class="">
</span></div>
</div>
<div class=""><br class="webkit-block-placeholder">
</div>
<div class=""><br class="webkit-block-placeholder">
</div>
<div class="">
<div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">openslide @3.4.1_1 (graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> A C library for reading virtual slides.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py27-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py34-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Obsolete port, replaced by py35-openslide</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py35-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py36-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py37-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py38-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">py39-openslide @1.1.2_1 (python, graphics)</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> Python binding for the OpenSlide library.</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255); min-height: 16px;" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class="">
</div>
<div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Monaco; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">Found 9 ports.</span></div>
<br class="">
<br class="">
<br class="">
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