Group Crashes

Intellicad 9.2.730.112619.PE+.VC15.x64.CMS92a

I created noname group with entities. After that, during the normal operations, it crashes when xref dialog box operation of dettach was running ...

Report was sent automatically.

When re-openning the drawing it was corrupted and recover operations says damage is impossible to recover. Report says Group Operation Error.

May I send the file to check it out.