This problem is caused by various address spaces terminating with latent cross-memory connections which leads z/OS to mark the address spaces 'non-reusable'.
To find out which address spaces are causing the problem you have at least 3 choices : (1) Install freeware MXI 4.3 (or the commercial MXI G2) from the link in my signature and run the MDQ command (using either the batch or ISPF interface) - this will show all non-reusable address spaces and the reasons for them being marked so. (2) Install SHOWZOS from the CBT tape site (www.cbttape.org). This program has a similar display to MXI (3) Take a in-flight dump of the PCAUTH address space and follow the information specified in IBM Info APAR II08563. (1) and (2) require you to install the software in APF-auth libraries as the information is gathered from the PCAUTH address space. (3) requires a bit of effort on your part and some IPCS control block chasing. Of course, there might be a extra option (4) if you have another ISV-supplied z/OS monitor that has a simlar display - I am not familiar with any of the other ISV tools (eg BMC, CA, Candle etc) to point you to any. The most common cause of non-reusable ASIDs that I have seen is sites that insist on recycling DB2 subsystems on a regular basis - the DB2 address spaces terminate with a latent cross-memory connection to the RRS address space. These can be released with a forced restart of RRS (SETRRS CANCEL) - but this is not the sort of thing that production environments allow. Rob Scott Rocket Software http://www.rs.com/portfolio/mxi/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html

