Reply to: Runtime Error!March 26, 2015 at 12:50 am
This error (the screenshot) is too generic to provide a specific answer, but runtime errors that are reproducible are almost always triggered by 3rd party modifications to XMetaL Author.
I'm not sure what “Author Assist” is though. It sounds like it might be 3rd party software (a plug-in/add-in/customization) in which case you should check with the maker to see if they have tested it with your version of XMetaL Author and whether they can reproduce the issue with your exact steps, files, etc.
If it is part of XMetaL Author (some feature I'm not aware of, or perhaps something we use another name for) then it would be best to submit a support case to XMetaL Support with as many details as possible. If the issue is reproducible then provide exact steps to reproduce the issue and any files required.