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CAD tip # 11479:

Question

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% platform category

"Assertion failed" error when launching AutoCAD.

Launching AutoCAD leads to an (ignorable) error message "Assertion failed" in IsValidToAddQATItem.

This error is reported by Windows (the XML module) - the module may be damaged or the XML files of the AutoCAD CUI menu may be damaged. Please try to update the ACAD.CUIX file (from another PC, from a backup or from your installation media), or just perform a repair installation of your AutoCAD and (re)install the latest AutoCAD updates (service packs, hotfixes).

ACADLT

* CAD

16.6.2017 6518×

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AutoCAD LT

applies to: AutoCAD · AutoCAD LT ·

See also:
Tip 8482:	How to convert CUI file to MNU or CUIX to CUI?
Tip 7896:	AutoCAD displays an empty ribbon only.
Tip 7604:	How to decompile a CUIX menu file?
Tip 4277:	What are the .CUI files?
Tip 2410:	How to export a XML file from AutoCAD?

Selected tip: Easy copying/moving of AutoCAD entities just by mouse dragging.

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