ACF/TAP uses trace data files as input. Therefore, it is necessary to create the trace data input files before running ACF/TAP.

For the generalized trace facility (GTF) for MVS™, before using a VTAM® buffer contents trace, I/O trace, NCP line trace, or transmission group trace with VTAM, you must start GTF at the host operator's console. The data collected by GTF is analyzed by ACF/TAP only if VTAM is the access method. For more information about GTF, see z/OS MVS Diagnosis: Tools and Service Aids.