I will send the RDR MODULE. I have had an open incident with IBM on this problem for some time but since I have no idea on how to reproduce the problem and given the transient nature of the problem I have not had much luck in providing IBM with information. After a system is restarted, LISTSERV will operate fine until the first time that error 26 (I think) is encountered from LISTSERV attempting to read a job card in LSVCARDR. Eric, I am going to make my next attempt at getting information by changing the LSVCARDR MODULE to give different return codes at the two places where the return code in question can occur. Anything special I need to be aware of when rebuilding this module.