Dear Experts I am refining my structures in windows mode and every time i got this crash message i do not know how to solve this issue? If any one encountered this problem kindly suggest me how to solve it. While when i refine with refmac the file proceeds smoothly but i want to final refinement in phenix due to utilize some parameters.its end like this: Exporting results ============================== Writing refined structure to PDB file: C:\Documents and Settings\pc user\Desktop\Refine_2\jbu_refine_2.pdb n_use = 7514 n_use_u_both = 7514 n_use_u_iso = 0 n_use_u_aniso = 0 n_grad_site = 0 n_grad_u_iso = 0 n_grad_u_aniso = 0 n_grad_occupancy = 331 n_grad_fp = 0 n_grad_fdp = 0 total number of scatterers = 7514 After that its not produce the map file and gave errore crash mesage file attached. Your suggestion highly obliged I would be very thankful to you Best Regards AFSHAN