MobiLink Synchronization Reference
  MobiLink Synchronization Server Error Messages
    MobiLink synchronization server error descriptions

The client cannot find the consolidated progress offset from the client transaction log(s)

Probable cause 

When the progress offsets in the consolidated and the remote databases are different, the MobiLink synchronization server may ask the client to redo the synchronization again with the progress offset from the consolidated database. However the requested consolidated progress offset cannot be found in the transaction log(s) of the remote database because the old transaction logs have been deleted or the requested offset has not been created yet.

Please find the source that caused this problem, and then rerun dbmlsync using the -ra or -rb option.