SACS modeler not launching in SACS CONNECT Edition v(15.1)

Hello,
Please I tried to launch sacinp. file in SACS modeler from SACS CONNECT Edition v(15.1) but it didn't launch the model and nothing came up.
The model was done using SACS CONNECT Edition v(14.1)
However, when I ran the runx files using the Analysis generator all the analysis ran successfully and generated the listing file and the psvdb. file. but again, I could not view the psvdb. file when I tried to open it using the modeler.

could there be a problem with the modeler?
What could be the cause/issue?