On Fri, 2017-10-20 at 19:04 +0000, Dempsey, Richard C wrote: > My searches for ap_check_pipeline, both online and in the source, tell me that it's declared in ./httpd-2.4.28/modules/http/http_request.c, but little else. Certainly, there is nothing about issues from the symbol being undefined. In the output from configure and make, I see that http_request.c is compiled. You've tracked it down right there in http_request.c. You appear to be mixing versions: new mod_proxy with an older core. Something to look at in your build/install process there, perhaps! p.s. if you're updating, you might want the new 2.4.29. -- Nick Kew --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx