How do I debug my program when it hangs?

Question

I have an application which takes measurements every second (I am running it in demo mode & generating random data, so the problem is not to do with reading from devices

Answer 1

First: try to debug it in Delphi IDE. Second: if you can't do this (on customer PC), try the "Process Stack Viewer" of my (open source) sampling profiler: http://code.google.com/p/asmprofiler/wiki/ProcessStackViewer
(you need some debug info: a .map or .jdbg file) Then look at the stack of your threads (probably main/first thread). You can post the stack trace here then (if you can't find the problem).