I got similar error as follows: 2011/12/15 01:59:00.942| aclMatchExternal: acexternal("Basic%20ZDA5NmQzYTItMDcxZS00ODViLTk3MDQtNzIyZGYzYWM2NTU2OjczZGMxOGI4LWY0ZGYtNDVhZi1hZDViLTllYTUyYTE2MDhkNA==") = lookup needed 2011/12/15 01:59:00.942| aclMatchExternal: "Basic%20ZDA5NmQzYTItMDcxZS00ODViLTk3MDQtNzIyZGYzYWM2NTU2OjczZGMxOGI4LWY0ZGYtNDVhZi1hZDViLTllYTUyYTE2MDhkNA==": entry=@0x3cecea8, age=69 2011/12/15 01:59:00.942| aclMatchExternal: "Basic%20ZDA5NmQzYTItMDcxZS00ODViLTk3MDQtNzIyZGYzYWM2NTU2OjczZGMxOGI4LWY0ZGYtNDVhZi1hZDViLTllYTUyYTE2MDhkNA==": queueing a call. 2011/12/15 01:59:00.942| aclMatchExternal: "Basic%20ZDA5NmQzYTItMDcxZS00ODViLTk3MDQtNzIyZGYzYWM2NTU2OjczZGMxOGI4LWY0ZGYtNDVhZi1hZDViLTllYTUyYTE2MDhkNA==": return -1. I am using 3.1.16. my external_acl_type is as follows: external_acl_type acexternal children=20 ttl=60 negative_ttl=1 %>{X-MYAUTH} /usr/local/bin/acexternal localhost Am I hitting the same error? --- I found the following code segment in external_acl.cc if (acl->def->theHelper->stats.queue_size <= acl->def->theHelper->n_running) { debugs(82, 2, "aclMatchExternal: \"" << key << "\": queueing a call."); ch->changeState(ExternalACLLookup::Instance()); debugs(82, 2, "aclMatchExternal: \"" << key << "\": return -1."); return -1; // to get here we have to have an expired cache entry. MUST not use. Can you please explain in what situations that this code segment will be executed? Thanks -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Squid-and-Splash-page-tp3473302p4237990.html Sent from the Squid - Users mailing list archive at Nabble.com.