EC650 RKM2EDS MODCB/SHOWCB/TESTCB ERROR. CODE=nnn.

Explanation
A control block manipulation request failed with the indicated return code. nnn is the feedback code for the operation. Refer to the IBM® VSAM programmer's documentation. 

System action
The command processing is terminated, and the next command is processed. 

User response
This is an internal software error and not a user problem; contact IBM Software Support.   