The VLTRAIL parameter allows variable-length output records to be appended with a character
string (C’text’) or a hexadecimal string (X’hh..’).
Figure 1. VLTRAIL Format
The specified string has a maximum length of 50 bytes and will be added at the end of both variable-length data records and header/trailer records. VLTRAIL is ignored for fixed-length output records.
The LRECL of the output data set must be large enough to accommodate the increase in record length, or MFX will terminate with a WER167A error message. This may require you to specify an LRECL on the output DD statement(s).
VLTRAIL processing is performed after processing for the optional VLTRIM parameter. VLTRAIL is mutually exclusive with IFTRAIL.