I have the same problems with multiple apps - Exim and UW-ipop. They both fail with the same faults: fork: Resource temporarily unavailable The Exim will send a few mails, but will fail after a few minutes use. UW-ipop fails the first time its called into use. Both are loaded as services into an x64 2008 R2 server. I notice the mail list has other "x64 fork" problem reports. My suspicion is the fault is in the core cygwin dll. Any thoughts please? -- Regards -- Ross Hemingway -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple