RSPLAN-Start Modeller does not open up browser

Hello all,

For transaction RSPLAN,when one of our users clicks on Start Modeller,it does not open up the browser.Nor there is an error message neither any other actvity.

Theres just a message at the bottomsaying "Browser Starting".

Strnge thing is the same user can open the browser through Start Modeller when RSPLAN is opend in SAP GUI 720 for the same system.

The issue happens for GUI 730!!!

I investigated all aspects and the only difference is GUI.

Can anybody advice me please??

I checked the other discussions as well but no help.