Record TYPE Determination
If there are one or more non-VSAM SORTMInn input data sets, the non-VSAM input RECFM will be used as the input RECFM for the application. All non-VSAM input files must have the same record format. If the RECORD TYPE specification differs from the SORTMInn RECFM DCB parameter for the non-VSAM input, the latter takes precedence.
If all SORTMInn files are VSAM, then the TYPE parameter on the RECORD control statement should be specified. If TYPE is not provided, the SORTOUT RECFM will be examined to determine the input TYPE. If no SORTOUT RECFM is found and the input files are all VSAM, TYPE=V will be assumed if the SORTOUT is VSAM and TYPE=F will be assumed if SORTOUT is non-VSAM or there is no SORTOUT.