A couple of weeks ago I posted a solution for a common error regarding .fchk files that will display the error below when opened with GaussView5.0. As I expected, this error has to do with the use of diffuse functions in the basis set and is related to a change of format between Gaussian versions. CConnectionGFCHK::Parse_GFCHK() … Continue reading Some .fchk files wont open in GaussView5.0 (Update)