I’m using Glyphs 2.6.4 (1286) I recently updated ShowMarkPreview and noticed this in the macro panel.
Traceback (most recent call last):
File “plugin.py”, line 20, in
class ShowMarkPreview(ReporterPlugin):
objc.error: ShowMarkPreview is overriding existing Objective-C class
I don’t recall seeing it before updating the plugin. I’m not sure what causes such things but saw a similar bug report when I Googled the message so thought you may like to know.
It works for me as expected in Glyphs Version 2.6.5 (1324). Can you check if you have the plug-in twice in your Plugins folder? Does it not appear in the View menu?