I hope your z/VSE system runs fine all the time. However, sometimes it might be necessary to contact IBM. A good source for all kind of information related to IBM software support is the Software Support Handbook . An updated version was just made available. You can download it here . By the way did you notice the tags on the right side of my blog page. I am trying to use meaningful tags for all my blog entries. If you click on a tag, you will get all blog entries related to this subject (tag). Have a good weekend.