MallocDebug "Unable to read malloc information from (null)"

Question

I have a certain .app built in xcode (version 3.2.1) as a Release build. I open MallocDebug and browse to the build directory, selecting the Release build and clicking the .app file. I then hit "Launch". MallocDebug then seems to freeze, giving me the spinning beachball for a minute or so, followed by the error message:

Read Data
"Unable to read malloc information from (null)"

What does this mean? What do I have to do to run my app in MallocDebug?

Answer 1

Interesting. I did some further coding and tried again. Now MallocDebug freezes for maybe 3 seconds after i hit launch, then it crashes and exits.

Any clues? Is there any other information I should provide? I know this isn't a lot, but I'm not sure what will help.

Thanks.