Training, Open Source computer languages
PerlPHPPythonMySQLApache / TomcatTclRubyJavaC and C++LinuxCSS 
Search for:
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
This week, we're updating our course layouts and descriptions. Presentation and materials always gently change over time, but just occasionally there's a need to make a step change to clear out some of the old and roll in the new. That's now happening - but over a long and complex site it's not instant and you'll see sections of the site changing up to and including 19th September.

See also [here] for status update
Access violation with Tcl_EvalFIle

Posted by jane (jane), 19 April 2005
Hi all,
I am not sure whether this is the right place to post this. If this post fits here, please help me. If I this is not the place, please point me to the right place.

I am very new to Tcl programming world.
I am trying to implement a TCL command in C.
Before that I wanted to try out a small experiment given in a book. But I am  getting an access violation(system error) when I invoke Tcl_EvalFile. If I use Tcl_Eval with same command, then it works just fine. Somebody please hel
p me.
This is on Windows XP platform.

Thanks a lot in advance.

This is the code:

int main()
Tcl_Interp *myInterp;
int retCode;
char name[] = "./simple.tcl";

myInterp = Tcl_CreateInterp();

retCode = Tcl_EvalFile(myInterp, name); // Access Violation
if(retCode != TCL_OK)
fprintf(stdout, "Error\n");

return 1;

contents of simple.c are : puts Hello.

- Jane

Posted by admin (Graham Ellis), 20 April 2005
I can't spot anything straight away (but it just might be staring me in the face!).  The best I can suggest is try the examples that we'ver got at which are pretty similar; if they work, then you can play "spot the difference" and if not then I can have a further look.  Also - do you have access to a "nix" operating system to test / see if your code works there.   A further thought - which C compiler are you using on the Microsoft system, and were the Tcl libraries compiled under the SAME compiler?  If not, that's a possible compatabilty issue.

Posted by jane (jane), 20 April 2005
Thanks for the reply, Graham. I figured out what the problem was. I called Tcl_FindExecutable before calling Tcl_EvalFile and it works now. Thanks once again for your time

This page is a thread posted to the opentalk forum at and archived here for reference. To jump to the archive index please follow this link.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2014: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 899360 • EMAIL: • WEB: • SKYPE: wellho