<p>If you have followed the special steps in our documentation for configuring memory debugging on AIX 5.3 and you are still having problems, you may be missing some required patches. On AIX 5.3, MemoryScape requires that the fixes for APARs IY66938 and IY78436 be installed on your system. The minimum version of fileset <b>bos.rte.libc</b> is 5.3.0.41, and the <b>instfix</b> command will tell you if these fixes are installed. For example:
<pre>%<i> instfix -k IY66938 -i -v</i>
IY66938 Abstract: user-defined malloc does not work in AIX 53

Fileset bos.adt.prof:5.3.0.30 is applied on the system.
Fileset bos.rte.libc:5.3.0.30 is applied on the system.

% <i>instfix -k IY78436 -i -v</i>
IY78436 Abstract: User Defined MALLOC doesn't work with _malloc_user_defined_

Fileset bos.adt.prof:5.3.0.41 is applied on the system.
Fileset bos.rte.libc:5.3.0.41 is applied on the system.
</pre>