I wrote code that did it and it saved considerable time.
Here is the setting/requirments
the processing programs can not be changed.
the program skips records till the first correct record is read- then
does one after the other till out of range or EOF.
The file is FBS (created under VSE which does not support DISP=MOD)
The file needs a full 3390 mod 27 (or bigger)
Solution: a POST-OPEN Vendor exit which manipulated the DTFSD such that
the next (first) read is way into the file.
Problem I ran into: multiextent-files (there is no way to tell the
op-sys to open the n-th extent of a sequential file during above
mentioned exit). This was no real restrictiooon since the file had its
own disk anyway - so creating it with singe extent on a disk was easy.
Martin
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