Oracle Error Codes

cannot make changes while change set string is advancing

The change set is currently advancing. Change sources related to an advancing change set cannot be altered. Change tables related to the advancing change set cannot be created, altered or dropped. Some or all the parameters of the change set cannot be altered while the set is advancing.

How to Solve :

Wait until the change set has finished advancing, then reissue the command. If altering the change set, only the advance_enable parameter can be altered during an advance.