Are you running web parts and recieve this error?
"Cannot have multiple items selected in a DropDownList"
Another symptom of this problem in ProjectWise Web Parts running on SharePoint is that the Content Web Part will not show the full ProjectWise address, and if you attempt to edit the web part, you will get the error mentioned above.
To fix this problem, log into your web server, open up the ProjectWise Network Control Panel, and "hard check" (not greyed out) the prevent udp box on each of the tabs.
As always, if you have any questions or further problems, contact Bentley Technical Support.