I'm trying to use the debugger from the TCC window. The debug window will be created, but quite frequently (but not always), as soon as I hit the start button, I get a window that says, "Take Command IDE/Debugger has stopped working," and when I click the close button, the debugger window closes and I'm back to the command prompt in my original TCC window. What's going on? Why can't I debug my batch files? I never had this problem when I was using the (ancient, but rock-solid) 4nt6. Environment: TCC 15.01.52 on Windows 7 SP1 64-bit (6.1.7601) Note: I tried this in a TC window, and it worked fine, although I only tried it twice. Note 2: Why is it that the command window - either the complete TCC window or the tab from which I executed the command in the TC window) always get cleared when the debugger IDE window gets created? Just curious.