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CCSv4 with 2812

I recently upgraded to Code Composer Studio Version 4.0.2.01003 and now I get this error "

C28xx: Flash Programmer: Device is locked or not connected. Operation cancelled.

C28xx: Trouble Writing Memory Block at 0x3f69fb on Page 0 of Length 0x2f1

Cannot write to target

 

 

when downloading code to a F2812 with a Spectrum Digital XDS510USB emulator. This worked fine with the previous version 4.0.1. 

Another project uses a F28335 and this works fine. Any ideas?