On 2018-01-30, at 11:20:10, Jon Perryman wrote: > >> Paul wrote: >> I can fool it by prefixing an empty temp Classic PDS. > Open uses the first dataset in concatenated datasets to fill in the DCB. The > second DD must be able to tolerate the DCB attributes from the first dataset. > The classic example is BLKSIZE= which determines the buffer size. The first > DD must specify at least the largest BLKSIZE in the DD concatenation. > > If you specified the attributes needed, then you would not need concatenated > datasets. > No, I have tried TRSMAIN UNPACK with a single UNIX file as archive. FILEDATA, RECFM, LRECL, BLKSIZE all specified. It fails without the prefixed empty data set.
-- gil
