-=> Quoting Daniel Lynes to Phil Crown <=- 

 DL> .
 DL> .
 DL> //  Track_Buffer[i] = *(ptr + i);
 DL> Track_Buffer[head] = '\0';

 DL> The above may be your problem.  (That and the strncpy()
 DL> function)...what's probably going on here, is that you're not keeping
 DL> the original pointer. You're writing over the pointer for Track_Buffer,
 DL> with that of ptr, so the free function is no longer looking at an
 DL> allocate buffer.  It's trying to free a null pointer.  DOS _should_
 DL> actually exit with an error of 'null pointer'. 
 DL> ... After they make styrofoam, what do they ship it in?

The code you quoted was something I tried and had commented out because of
the point you mentioned about incrementing the pointer.

strncpy() I didn't think would increment the pointer or does it?  I have
noticed that if the code is compiled under EMX 0.9a it does not cause a
sys3175.

         ////
        (o o)
----oOO--(_)--OOo----   phil.crown{at}bluecafe.com | Fido 1:124/6108.2

--- Blue Wave/Max v2.20