This is very very very strange. I was attempting to build a VC++ 2005 application on a campus network drive. I have full read/write access to the directory I am using. During one build, VC++ created these RSP files, all of a similar format: RSP00000239043672.rsp. They are in both the Debug and Release directories. But now I cannot re-build my app, as it is trying to delete these files, but says "Access Denied". I can't delete them manually. I have restarted my computer. Terminated VC++. Deleted all compiler generated files... I am at a loss. Has anyone seen this? I can create a .rsp file and delete it myself, so it seems I should be able to delete all .rsp files...