I've got a drawing where the parcels for the entire county, with data, are defined as a block from when the XREF was inserted into the drawing and then bound. In 2015 if I select from the ribbon the Insert>Insert button I can fatal error C3D 2015 every time.
Once I purged the block the drawing went from 73MB to 750k and it no longer crashes when selecting the Insert>Insert button. It seems that the new drop-down box that shows a preview of the blocks can't handle a large block with data.
C3D 2022-2024
Windows 10 Pro
32GB RAM