IBM Support

I am getting VTAM message IST565I STORAGE UNAVAILABLE: VTAM PRIVATE AREA SUBPOOL 127. What do I do to determine the cause?

Question & Answer


Question

What steps should be taken if receiving message IST565I?

Answer

the IST565I message indicates that a GETMAIN failed for the VTAM private area subpool displayed in the message. The specified subpool (in this case 127) might be the source of the problem or the problem might be caused by another subpool that is affecting the subpool displayed in the message. The MVS GETMAIN macro failed trying to get private storage for VTAM either because there was not enough private storage in the system to satisfy the request, or not enough storage available in the VTAM private storage region. The first thing to do is issue the VTAM STORUSE command with the pooltype=private,list=inuse parameters:

  • Issue the VTAM Display: d net,storuse,pooltype=private,list=inuse

This will give you a list of VTAM private storage SPANC pools with their current and max values.

It will also tell you the total current and max VTAM private storage usage for all of VTAM.

Look for SPANC pool names that are using a large amount of storage relative to the overall max usage. Search on this name for possible APARs for your release level. If none found, issue a VTAM CSDUMP command and contact IBM Comm Server support for diagnostic help.

Also verify that your VTAM private region size is large enough to accommodate network failure and recovery situations. You can set REGION=0 which is unlimited and let VTAM take what storage it needs, then do the STORUSE display above to see what it settles out at...

If you are unsure about the output of the display, or the error message in general, take a dump of VTAM via CSDUMP command and contact IBM Comm Server support.

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Product Synonym

ZOSCS COMMSERVER

Document Information

Modified date:
05 June 2015

UID

dwa1194878