RECORD clause gives range of record lengths. %1 will be used.
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Cause . . . . . : In the RECORD clause you have specified a range of record lengths from %2 to %3. For non-tape files, this format of the RECORD clause uses fixed length records which have the length of the longest record description for a file. In this case, length %1 from record description %4 will be used for a WRITE or REWRITE of any record description for the file.
Recovery . . . : If you want to use varying length records, use format 2 (RECORD IS VARYING) of the RECORD clause.