BICO: Writing to parameter not permitted as the master control is active

What does 201515 mean?

This alarm occurs when an attempt is made to change the number of Command Data Sets (CDS) or copy from a CDS while the master control is still active. Parameters related to BICO (Bi-directional interconnection) configurations cannot be altered under these conditions to maintain system integrity. This is a functional restriction rather than a critical fault, typically requiring no immediate action as the system prevents an invalid operation.