We have multiple customers who recently have received the PM_Key_Mstr error message when posting AP batches. It is odd that it has happened with multiple customers. We have not applied any updates to their GP instance recently. I have noticed that it does seem to appear more frequently on the customers who are using a terminal server. Could this be something to do with a windows update? I don't think it is a connection issue because they are using a terminal, but not sure what else would cause this. Has anyone else seen this issue appearing recently?