Yes, that makes perfect sense. I didn't make any changes and that's why it didn't show any problems on the second build but did show problems on the rebuild. Thanks for the help,Jim....

Hello, thank-you for the response. I actually only have the one project opened. The files are being ported from another project so you know. The CubeIDE works fine if I build a generic project from scratch. It's the porting process somehow is doing i...