An error is thrown during Sync script execution:
2014-05-07 10:21:00,378 INFO Subscription 1000058: was not synchronized because of errors (Error during OpenAPI call: Application configuration script reported errors: '')
And following line is present in the logs on MOSI gateway:
Method usercheck calling failed. Reason:Cannot serialize null object. Parameter name: obj
Due to APSA-7165 synchronization fails if a user on MOP side has a non-UTF character in first or last name.
Rename the user in MOP and re-run the sync script.