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Windows: ORA-12542: TNS: Address Already In Use (Doc ID 2261112.1)

Last updated on AUGUST 30, 2023

Applies to:

Oracle Net Services - Version to [Release 11.2 to 12.2]
Oracle Database - Enterprise Edition - Version to [Release 19]
Information in this document applies to any platform.


An Application (such as Trapeze) running on a Windows machine, may be hitting the following errors intermittently:
ORA-12542: TNS: address already in use

This may or may not be in a High Transaction environment.


There may have been a recent installation of a Security program, such as Checkpoint.
There may have been a recent reboot of the Windows machine which has resulted in the above security program now being active.


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