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Dear Macports users,
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<div class="">I have a MacBook Pro with MacOS 10.13.6 on which I installed several programs through Macports. However, when I installed the grace package in order to use plotting program xmgrace, the following message error pops up:</div>
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<span style="font-variant-ligatures: no-common-ligatures" class="">Warning: Widget must be a VendorShell.</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class="">Error: attempt to add non-widget child "dsm" to parent "xmgrace" which supports only widgets</span></div>
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<div class=""><span style="font-variant-ligatures: no-common-ligatures" class="">Notice that I have successfully installed the grace port on other older and newer machines without any problem.</span></div>
<div class="">Googling the error, I found several old posts, which provided various possible solutions, including installing a version of XQuartz older then 2.7.9, but none of them worked for me.</div>
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<div class="">Therefore, I decided to remove completely Macports (and its ports) from this laptop by the procedure found here:</div>
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<div class=""><a href="https://guide.macports.org/chunked/installing.macports.uninstalling.html" class="">https://guide.macports.org/chunked/installing.macports.uninstalling.html</a></div>
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<div class="">together with XQuartz. Then, after a reboot, I reinstalled Macports, XQuartz and just the grace package. In spite this reinstallation I keep having the same message error.</div>
<div class="">Finally, I tried to create another account on the same laptop, installing Macports, the last available version of XQuartz (2.7.11) and the grace port in there, and this time the xmgrace programs opens like a charm.</div>
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<div class="">I therefore guess that the problem in the original account is caused by some user configuration, which is not removed while uninstalling Macports and XQuartz. As last attempt I tried to remove also the hidden account folder ~/Library, and reinstall
again Macports and XQuartz but also this time the xmgrace command outputs the usual error message.</div>
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<div class="">Do you have any suggestion what I could try in order to identify the configuration file that triggers the above error? Since the original account has a lot of important data, I cannot simply remove it and create a new account in order to use xmgrace.
I would really like to find the source of the error.</div>
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<div class="">All the best,</div>
<div class="">Emy</div>
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