This warning can be either hard or soft, and indicates a transaction with cash offsets linked to them has failed to post. Therefore, the offsetting cash transaction failed to post as well. These cash offsets should not be modified. Research the associated transactions at your custodian for any issues. Once the issue that prevented the posting of the transaction has been resolved, the cash offset transactions will safely post along with them.
See Also
Handling Warnings in the Import Blotter