Hi, I am writing an application on Windows XP using ghc 6.10.1 that manages test cases (same applies to ghc 6.8.3). For each selected test case, the application runs an executable associated with the test case using System.Process.runInteractiveCommand. These processes have to be aborted in some cases, for example, when their specified termination time is up. As I realized, however, aborting these processes using terminateProcess is not reliable. Most often, the processes do not terminate correctly but have to be killed from the Windows Task Manager. In some cases, the process still produces output - in particular if I apply getProcessExitCode on the process just killed. By the way: calling and killing the process from the shell with Ctrl-C successfully kills the process. Any advice on how to reliably terminate a process on Windows? Thanks, Bernd