ATKDebugger is C Extension to provide debugging specific commands to Tcl. It is low API to enable to write debugging tools in Tcl. It requires patch to Tcl8.4.1 Downloads and more infomration incuding the description of internal implementation and API. http://www.xdobry.de/atkdebugger/index.html This functions are possible now: 1. invoking debugger in error case (not catched errors) 1. breakpoints 1. invoking debugger per special atk::halt command The package contains also some example GUI debugger written in Tk. atkdebugger is full integrated into [XOTclIDE] Autor: [Artur Trzewik] ---- See also [What debugging tools are available to a Tcl programmer] [Category Debugging]