When you issue a remote operation request to XDM/DCCM3, not only a network failure but also the following conditions cause DCRPCER_NET_DOWN.

• Incorrect message format
• Incorrect transaction name
• Invalid combination of the transaction type and the RPC call type
• Invalid combination of the transaction type and the virtual terminal type
• Inhibited transaction input
• Transaction shutdown
• Security error
• Input queue error

When the same personal computer or workstation uses multiple CUPs on TP1/Client, you may issue a synchronous-response type RPC to an XDM/DCCM3 terminal that is dedicated to the remote host computer and concurrently works as a send/receive terminal. In this situation, specifying an XDM/DCCM3 transaction to be inquiry-response type causes a duplicate input error. As a solution, specify the transaction type to be no-inquiry-response type.