On Mon, Aug 05, 2019 at 08:57:45PM -0400, Fred Smith (fredex at fcshome.stoneham.ma.us) wrote: > Hi all! > > I'm stuck on something really bizarre that is happening to a product > I "own" at work. It's a C program, built on CentOS, runs on CentOs or > RHEL, has been in circulation since the early 00's, is in use at > hundreds of sites. > > recently, at multiple customer sites it has started just going away. > no core file (yes, ulimit is configured), nothing in any of its > (several) log files. it's just gone. > Late to the thread but since it has not been suggested: Have you tried to statically link all libs? Then use Frank Cox's suggestion to use printf's at location thoughout the source code. I know it will be big (depending on the number of libs) But this way you are sure that the compile is against a known (yours) set of libs! Also have you recompiled it and given the new binaries to the customers? Just an idea .. -- Jobst Schmalenbach Nice computers don't go down.