Limitation of REXX in accesing datasets

skrishnavijay · New User Joined: 26 Sep 2007 Posts: 25 Location: chennai

Could you clarify the following plz ?

1. Is it possible to create(or copy) a tape dataset using REXX ?

2. When I was trying to read a seq. file with 90000 records(LRECL 147)
the below msg populated

EXECIO error. Unable to obtain storage.

What is execio limit in REXX ?

Krishna

enrico-sorichetti · Posted: Thu Oct 11, 2007 2:07 pm

answers:

1) yes

2) the DISKR with a * count
is limited only by the amount of memory available

but a curiosity..
why use rexx to copy?
for copy operations with simple transformations there are
other tools available and more performing ( sort for example )

skrishnavijay · New User Joined: 26 Sep 2007 Posts: 25 Location: chennai

Hi enrico,

Thanks for ur reply.

for the 1st Q, (1. Is it possible to create(or copy) a tape dataset using REXX ?), could you plz give me REXX code for creating a Tape file LIKE an existing Tape file ?

As u mentioned I used IEBGENER for copy.

Thanks in advance,
Krishna

enrico-sorichetti · Posted: Thu Oct 11, 2007 4:09 pm

in the MVS environment
device indepence is the basic postulate of data management

for PS datasets processing using QSAM
( queued sequential access method )
the program is never concerned about the dataset placement
everything is specified thru JCL

to read and write given enough memory to hold all the lines
just two statements are needed
( just the barebones )

expat · Posted: Sat Oct 13, 2007 3:05 pm

I would say that IEBGENER would be a far more efficient way of performing the copy rather than by using REXX.