RE: Fw: Free error.

In debug put a break point on malloc line.  If after that it isn't null, and
at free() line it is null, your pointer storage is being stumped on. 
If pointer 'znd' is local to the function, check which variables precede it
and see where you set it/them. This is probably where the corruption
happens.
If 'znd' is not local pointer but passed in by "copy", then your stack is
being corrupted.  

In any case, double check your code for walking out of boundary when setting
your variables.

Elvis

-----Original Message-----
 Subject: [C400-L] Fw: Free error.

Can some one tell me what I'm doing wrong.  I use MALLOC to allocate some 
storage, then I call a procedure.  When I return from the procedure I use 
free to de-allocate the memory block.   


My code is as follows: 

/* Convert field to zoned. */ 
zlen = sizeof(decimal (DEC_DIG, 0) ) * 2  - 2;               
znd = malloc(zlen); 
result = QXXBTOZ(znd, zlen, bin, blen, hassign);             

if ( result ) return result;                               
result = QXXZTOC(chr, clen, znd, zlen, dp); 
 
/* Free allocated memory. */                               
free(znd);                                                 



But I get the following errors: 

The requested heap space operation is invalid. 
The pointer parameter passed to free or realloc is not valid.       


Thanks for your help.

Bobby.