Hi,
First of all check the .cmd file (linker file) for any memory conflicts. Also,
[quote]C28xx: Trouble Writing Memory Block at 0x3f713c on Page 0 of Length 0x2c[/quote]
Seems like the segment is inaccessible. So try editing or using a different cmd file meant for the controller.
Secondly, if none of them work; use CCS Uniflash to unlock the flash completely and then try loading the code.
Regards,
Gautam