Joined: 18 Jul 2007 Posts: 2150 Location: At my coffee table
It doesn't look like it......
SyncSort for z/OS 1.3 Programmer’s Guide wrote:
Concatenating Input Data Sets
SyncSort must determine one set of DCB characteristics to use for reading all data sets in
the concatenation. The following rules apply to the DCB characteristics:
• When the first data set is fixed-length (RECFM=F, FB, FBS), all subsequent data sets
must be fixed-length and have the same LRECL.
Try looking at the JOIN, different inputs can have different record lengths and formats.