LISTSERV will support CP6. I anticipate no problem with CP6 itself, but if there are some, I will fix them. As I had previously announced, LISTSERV will not be supported under CMS6. Moving the LISTSERV code into a file-pool is a very bad idea, as it might seriously impact performance, and I do anticipate problems with parts of the code (not just the assembler parts, but also stuff using LISTFILE and expecting standard CMS fileids). In any case, this is not a supported configuration, and if it breaks, I won't fix it. The SFS delirium will be supported by LISTSERV when and if IBM comes with a version of CMS which can work under both SP and XA and provide identical functions in the two environments. For your information, rumour has it that IBM is completely redesigning the SFS because, as you might have expected, they had not realized that the approach they took with SP6 would be such a major system bottleneck on "large" systems. Which is probably why they didn't implement it at all under XA so far. Eric