dyld: Library not loaded: libmaloc.dylib

I want to apologize if this is not a proper question for this forum. But I can not find any other place to address my problem.

I am using a Python based program (Pymol-APBS tools) for work. I installed Pymol and the APBS plugin using MacPorts. When I run the program, it didn't give the proper output and I think the following message might be the reason:

dyld: Library not loaded: libmaloc.dylib

What should I do to solve this problem?

THanks!