AQTime displays this message when it cannot attach to the process you have specified in the Attach to Process dialog. The most likely cause for this message, is that the selected process is running under another debugger, for instance, under Microsoft Visual Studio or Borland C#Builder. Another reason is that the process was terminated during the time interval after AQTime has filled the list of processes and before you have selected the process from the list. To solve the problem, make sure the desired process exists and that it is not running under an external debugger.