Anytime I save an xref, I get the following in the command line when I reload the xref at the sheet level:** File P:\New Drawings\ROCKWALL 030706\xref files\9A-AD1A.dwg isn't a valid drawing.*Invalid*This just started yesterday.  I am using AutoCAD Architecture 2011.  Any help is appreciated.  Thanks.

What is the source of the xref?  Did it come from a client or another sub-contractor perhaps?

[QUOTE=John Connor]What is the source of the xref?  Did it come from a client or another sub-contractor perhaps?

[/QUOTE]Nope.  A file I created.  This problem also started on 3 other machines...two 2011 and one running 2012.

Have you tried running a PURGE and AUDIT on the file?

[QUOTE=John Connor]Have you tried running a PURGE and AUDIT on the file?

[/QUOTE]Purge, yes.   Audit no.  Will try that.  Thanks.

When you run PURGE do you delete all unreferenced RegApps?

[QUOTE=John Connor]When you run PURGE do you delete all unreferenced RegApps?

[/QUOTE]Yes, I purge everything.

First run the command line version of purge and specifically target REGAPPS all by themselves.  Then go back and do it a second time but select the option "ALL".Then run the AUDIT command.Finally, save the file before doing anything else.