# CICS and IMS Environments

For CICS

- The TIB3WLOG DLL module must be in a library and defined in the DFHRPL path of the CICS Region.
- The PCT (program resource definition) must be installed. It is supplied by default with the installation.

For IMS

- The TIB3WLOG DLL module must be in a library and defined in the STEPLIB path of IMS application regions, where user programs issue a Mainframe Logger call.

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