The root of this problem is poorly chosen block sizes for the output
data sets that contain load modules. Always, always, always use a block
size of 32760 for RECFM U data sets that contain load modules and move
them around using COPYMOD. Specify PARM=SPCLCMOD so you don't get
warning messages about the few modules that COPYMOD won't reblock. (It
will do what you want; don't worry, be happy...just use BLKSIZE=32760
and COPYMOD with PARM=SPCLCMOD.)
That will make this entire issue evaporate. As a bonus, your load
libraries will likely take less space (never more) and performance might
improve slightly (and will never be worse).
To partly answer what you asked: What I believe you think you want to
find is the length of the longest text record, not the length of the
member. Each member of a load library comprises some number of text
records of variable length (up to the block size) and a number of other
records. If you search the archives you will find a lengthy post I
wrote some years ago that explains how the Binder and IEBCOPY write text
records that will probably shed some light on what you are seeing. And,
you can look up which record contains the length of the next text record
and process those records to get that information if you choose to.
However, finding the length of the longest text record in a load library
as a means for trying to prevent IEB188I messages or their rarer COPYMOD
counterparts is, in my opinion, not a productive use of time when the
best and smoothest road to improvement is paved with the right choice of
block size.
ibmm...@foxmail.com (ibmmain) wrote:
Hi
Which length do you mean? The length of the member?
We want to know the length of the member.
When we copy some members in a loadlib to other one,we received the IEB188I
message, and only want to copy the dataset
Later we used COPYMOD instead of a COPY to do this.
However, We want to know the length of the member in the new LOADLIB .We wonder
wherther record with length is longer than blocksize in the new dataset
Thanks a lot!
--
John Eells
z/OS Technical Marketing
IBM Poughkeepsie
ee...@us.ibm.com
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