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.