psvbd not opening for combine run

I am having an issue with psvdb file of transportation analysis done through GAP file options. All list file are getting generated with no error and warning. While i try to open the psvdb file it blink and then window get crashed. i am having this isssue while generating psvdb for combine file which is combining sacinp for tow input  gapcsf for static run and gapcsf for tow run.It's not related to size of file as i am already tried replacing SACSIN.DAT with model file and moreover the size of psvdb is just 20MB.

Kindly help if someone have gone through same issue  before. while opening the psvdb in postvue it is displaying  an unknown error as shown in attached snapshot.