I've submitted a MP2 calculations with 54 atoms (C H O Si and Ti) with dual basis set (6-31g and LANL2DZ) to optimize the structure. The program terminates with an error " Erroneous write. Write -1 instead of 343932264.". I've my scratch space more than 80GB. I can run the same kind of MP2 calculations for simple structure containing 8 to 10 atoms and this terminates normally. The program also terminates normally for DFT-B3LYP theory level for 54 atoms with same dual basis set (using Gaussian). I tried to increase the memory but it does not help. Can anyone suggest how to come out of this error with 54 atoms in MP2 calculations?