I have a application which takes tcl script as argument. I want to debug tcl script when the application processes it. My development environment consists of Dynamic Languages Toolkit from www.eclipse.org/dltk along with Active state remote debugger -dbgp_tcldebug. I am able to debug the individual tcl scripts with this setup. I created a tcl project in eclipse and added 'startup.tcl' and 'argumentScript.tcl' scripts and added following command to the startup script, set ExecutableName "xyz.exe" set returnValue [catch {eval exec $ExecutableName "argumentScript.tcl" } result] My debugger works fine with 'startup.tcl' script. I added the breakpoint in 'argumentScript.tcl' but it is not working. How can I debug the "argumentScript.tcl" script ? Edit: A solution without using eclipse environment is Tcl Dev Kit with remote debugging feature.