We are programming with RFU 10.64 and using RCM4310. We get the error below.

We keep getting the error ‘failed to load image’. We have programmed these processors with the same setup for 6 years.

We can program the RCM 4210 with no issues. Does anyone have suggestions to this issue?

Recent revisions of the RCM4310 modules use a different serial flash, and it requires you to update your Dynamic C installation (so DC and RFU can use updated updated bootstrap code) and recompile your software to a new binary (so your program can access the serial flash).

Details here: http://knowledge.digi.com/articles/Knowledge_Base_Article/Serial-Flash-End-Of-Life-Patch-Support

The Dynamic C 10.72A installer includes that patch along with numerous bug fixes made since the release of 10.64. Digi has released Dynamic C on GitHub if you want to stay up to date with fixes as they’re released.