Please tell us more:
* What operating system are you using? What version?
* How and where did you install TCL? What version?
* Where did the script you are trying to execute come from? What args does it expect and what is it supposed to do?
If I understood your question, you have an existing TCL program (that you did not write) in one file, and you want to execute it from a TCL program in another file that you are writing. Is that correct?