Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

Essential information

When your application accesses an existing STREAM file, PL/I must obtain a record length value for that file. The value can come from one of the following sources:

If you are using an existing OUTPUT file, or if you supply a RECSIZE value, PL/I determines the record length value as described in Creating a data set with stream I/O.

PL/I uses a default record length value for an INPUT file when:

Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide