What are you trying to achieve? If you just want to be able to write to BMax's debuglog from C, then write to StdErr. That's what I do, and that definitely works fine from the IDE for me.
Other than that, you might just be sending a character that the IDE can't handle? After all, it is the IDE that has to print the StdOut and StdErr stuff into the debuglog.
Other than that, you might just be sending a character that the IDE can't handle? After all, it is the IDE that has to print the StdOut and StdErr stuff into the debuglog.