This read-only counter tracks how many times the proxy agent discarded a data value from the RAID7 array because it was out of the expected range, which the description notes may indicate a version mismatch between agent and array or a serial link problem. Admins use a rising count as an early sign of a compatibility or cabling issue that needs investigation. A sudden jump in this counter after a firmware update points the admin toward a version-incompatibility issue between the proxy agent and the array.