Here's one I've never seen before. This is Win98SE. There is a legacy DOS based app that runs off the network on these machines. Netware server for this particular program.

I've always used the icon file that sits on the server. Never been an issue, until these two machines I just obtained. I did the OS install. The machines are do not have identical hardware. Double clicking on the icon gives the following message, in a white box:


SYSTEM ERROR
"The file you are trying to open is already in use by another program. Quit the other program and then try again."

Pressing "CANCEL" allows the program to go ahead and run.

Copied icon to local hard drive, and pointed to it. No error any more.

Any thoughts on why this happened?

Hmmm...I wonder if one of the recent Microsoft patches is the culprit.