The activation with SCN option fails with:
sp_ctrl (alvsupu07:5438)> activate config config1a SCN= nnnn
Error: Unable to activate config at nnnn
Event log entries:
Info 2015-02-02 17:40:44.413328 7801 1 Activation exited with code=1, pid = 7924 (activating sid sourceSID)
Error 2015-02-02 17:40:44.367288 7924 1 Compile of "config1a" for sid o.sourceSID failed: Error: Unable to activate config at nnnn
Error 2015-02-02 17:40:44.347133 7924 1 Activation: Failed to find redo sequence# associated with recovery SCN 100 for instance: 'sourceSID' thread: '1'. ORA-01405: fetched column value is NULL. (activating sid sourceSID) [module ocf]