When running autodock program in command prompt following error can be seen. 

Prefix for ligand 1 will be ligandcoa_out_ 

Detected 4 CPUs

Reading input ... done.

Setting up the scoring function ... done.

Analyzing the binding site ...

Out of memory error

What is the reason for this error? Can anyone help for this problem it will be great help for me. I will attach the screen shot of error message.