"Scan interface error" when connecting to a DB2 database restored on a different server
Do you know which fix pack both versions were on? I found this APAR list which mentions the error if you move from FP1 back to the GA release of 10.1. It looks from what I'm seeing elsewhere on the web that this can result if you restore from a newer version of DB2 to an older version (possibly even fix pack-wise) such as the link above shows. Check to make sure both are at the same FP level to rule out the problem.