I decided to do a fresh SolidWorks install on my laptop of the 2007 version recently received. There were a couple of previous versions installed prior so I wiped everything out, including all SolidWorks components in the registry. After rebooting for the registry setting to take effect, I reinstalled 2007 v1.1 with no problems. When I try to open my add-in XMLPropWorks.dll, I get the following message "Unable to initialize Add-in component". This is a VB app that I developed some time back and it was working on 2007 before I decided to do a clean install. In attempting to figure out what was going on, I decided to try and debug the app in Visual Basic. In the past, I've used VB6debug.dll to debug dll add-ins to SolidWorks in Visual Basic 6. Trying to load VB6debug.dll in SolidWorks produces the same response, so there is obviously something odd going on. I tried to load swCP3 as well with the same result. I did manage to load dxf3Dexport.dll successfully. I suspect it's a VB issue, but obviously don't know what. Are there any option settings or something that must be toggled allowing the loading of third party dll's? Any other ideas? Thanks =========================================================================== Chris