How to fix the Oracle error TNS-04065: The number of remote CMCTL sessions exceeds (MAX_CMCTL_SESSIONS-1)?

In this post, you’ll learn more about the Oracle ErrorTNS-04065: The number of remote CMCTL sessions exceeds (MAX_CMCTL_SESSIONS-1) with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-04065: The number of remote CMCTL sessions exceeds (MAX_CMCTL_SESSIONS-1)

Reason for the Error TNS-04065: The number of remote CMCTL sessions exceeds (MAX_CMCTL_SESSIONS-1)

Cause: The Oracle Connection Manager instance already has (MAX_CMCTL_SESSIONS-1) number of remote CMCTL sessions connected to it.

How to fix the Error TNS-04065: The number of remote CMCTL sessions exceeds (MAX_CMCTL_SESSIONS-1) ?

You can fix this error in Oracle by following the below steps

Action: Use an already connected CMCTL, or, use a higher value for the parameter MAX_CMCTL_SESSIONS in the CMAN.ORA file.