'Cannot Open Solution' Client in Citrix

[Providence1]

Some of my Citrix users are getting an error as soon as they launch Servoy Client. It happens even before they get the Open Solution dialog box.

Each user on Citrix has their own Application Data folder with the Sun / JAVA folder inside.

One of my buddies said he emptied the cache in there to get it to work but can't tell me which cache or file or folder he emptied.

It's been inpossible to reproduce. I could try uninstalling JAVA from the Citrix Server, but that would affect everyone. This seems to be localized on a pure user basis.

Any ideas what file is getting corrupted in the SUN / JAVA folder?