Q:
I'm running NEXTSTEP 3.0 and when I copy anything in Diagram!, running from a remote file system, it crashes.
A:
It was a NEXTSTEP bug in 3.0. Upgrade to NEXTStep 3.1 and it should not happen anymore.
It was a problem with NeXT's autonfsmount and has nothing to do with Diagram! at all. Diagram! would crash everytime you do a copy of an object. The same problem is encountered with Virtuoso and IconBuilder.
The problem manifests when the files are automounted from a separate file server. We have tested Diagram on an untitled doc, a doc in a home directory, and a doc in /tmp. Sure enough, the one in the home directory crashed, the other two were fine.