Dear all,I have installed ccp4i 6.5 version, I need to find out the contacts between the atoms of SAM and amino acid residues of the protein. But I'm not getting the output. Output is showing like this#CCP4I VERSION CCP4Interface 6.5.0#CCP4I SCRIPT LOG contact#CCP4I DATE 02 Jun 2015 17:33:09#CCP4I USER 'UNKNOWN'#CCP4I PROJECT deepasam#CCP4I JOB_ID 64#CCP4I SCRATCH C:/ccp4temp/#CCP4I HOSTNAME DEEPA-PC#CCP4I PID 7176**************************************************************************** Information from CCP4Interface script***************************************************************************The program run with command: contact XYZIN "D:/sum_proj/New Folder/structure analysis/5.6.2014/1XDS_chain_A.pdb"has failed with error messagecouldn't execute "contact": invalid argument***************************************************************************#CCP4I TERMINATION STATUS 0 "couldn't execute "contact": invalid argument"#CCP4I TERMINATION TIME 02 Jun 2015 17:33:09#CCP4I MESSAGE Task failedplease suggest the solution for this problem.Thank you in advanceWith Regards,Deepa