Dear friends the problem on DISTRIBUTE function on listserv running under VM/SP5 has been resolved. There was a blank in first column of SYSTEM NETID file therefore the CPUID was not matched and RSCS was not known. Thank you Ross and Eric.. A last question to everybody: I've tried to use the DATABASE function to search a string on a LISTS database and the result has been that an error 100 occured in LSVDBS module. Reading the source assemble file this error means that * 100 -- undetermined error in DBNAMES/DBINDEX/document How is possible to know more details on the metod used in LSVDBS program to search in DBINDEX and DBNAMES..?? Of course I've tried to read the comments in ASSEMBER source BUT is not very clear the algorhythm used when that return code appears. Thank you very much for the helps needed in the past and for the next I've mentionated before on LSVDBS. G. Turso