Ctrl-C handling issues

[lsmart]

I am sure I can´t help you, but maybe you find the souliton if you ask yourself some smart questions like:
* Does your program have multiple tasks?
* Is it started from Workbench, or is the break signal sent via CLI?

Seeing the string look identical is nice, but have you patched your code or used a debugger to ensure it is really read from that memory location?

[lsmart]

One more:

* are all your units of compilation (i.e. before linking) share the same definitions of chkabort and CXBRK?

[lsmart]

>it auto-opens the CLI window on its first printf().

You are using printf? Doesn't this mean you are including and linking some standard C-Library stuff, which might include its own definitions for handling BRK? Are you using your own startup code?

Maybe ChaosLord is right. Try it on a "virgin Workbench". How often does the problem occur? You could write a small program/loop that does nothing but start AA (or better a third small programm that just shows the CTRL-C problem) and then send BRK .