Oracle Message ORA-15512 - directory string does not contain a valid processed workload capture

ERRORdirectory string does not contain a valid processed workload capture
CAUSEOne or more files created by DBMS_WORKLOAD_REPLAY.PROCESS_CAPTURE were missing.
ACTIONProcess the workload capture using DBMS_WORKLOAD_REPLAY.PROCESS_CAPTURE and then retry the command.