Hi

I don't know if my answer will help you but you can change it, just follow steps :

1- right-click accumulated time step from the expressions screen

2-chose (use as the workbench input parameter)

3- form picture, you can change -1 to 100

and a new number will change in the expressions screen

Momen Sami Saleh thanks for your help..will follow your suggested step..really apppreciated it..Thanks a lot.

Zuraidah Rasep your welcome