I am running listserv version 1.8d on an sgi machine (Os Irix) I get the following error when I use certain options from the List management menu on the web access ******** Server Error This server has encountered an internal error which prevents it from fulfilling your request. The most likely cause is a misconfiguration. Please ask the administrator to look for messages in the server's error log. ******** Example: Select LAYOUT or Customize Layout The error log is [17/May/2000:11:40:34] failure: for host 137.207.96.42 trying to GET /cgi-bin/wa, cgi-parse -output reports: the CGI program /usr/netscape/suitespot/docs/cgi-bin/wa did not produce a valid header (program terminated without a valid CGI header. Check for core dump or other abnormal termination) access log 137.207.96.42 - - [17/May/2000:11:44:14 -0400] "GET /cgi-bin/wa?LAYOUT1=TEST_L&X=541C6459C8 120EE139&[log in to unmask] HTTP/1.0" 500 305 ************* From the same page, Subscribers, Configuration, Templates, Bulk op., Mail merge work ok. Any help will be very much appreciated. Jaya Sreedharan IT services U of Windsor