Troubleshoot insufficient RPC threads for concurrent queries

If there are insufficient RPC threads for a large PI to CONNECT transfer, the transfer will fail and the event log will contain the error OSIsoft.PI.Net.PIException: [-10767] Client exceeded maximum concurrent queries in RPC thread pool.

To resolve this issue, increase the OperationTimeout parameter in C:\ProgramData\OSIsoft\PIToOCS\appsettings.json to 300 ("OperationTimeout": 300).

Note: For new installations, the default is 300 seconds. If the value is 30 seconds, it is likely that you have upgraded from an older version.