Design for scoreboard HELP!! (simulation error:Timestep too small)

[JoevicRoi]

hi guys, i have a problem with my design in multisim, I don't know how can i fix it without convergence assistant.
I'll just follow this design i have created and I'm worried if this design would not work in actual. Can you help me fix what's wrong with my circuit? Why does it gets simulation error: timestep too small?

 

[fvm]

https://www.google.com.pk/search?q=Timestep+too+small&ie=utf-8&oe=utf-8&rls=org.mozilla:en-USfficial&client=firefox-a&channel=np&source=hp&gws_rd=cr&ei=uM_2UvPyEabZ0QWYo4HYCA

 

[JoevicRoi]

thanks for that but I need an explanation based on my schematic diagram

 

[crutschow]

It's difficult to know the problem just from looking at the schematic. Does it say anything besides "timestep too small".

 

[eTech]

Noticed--

U8, pin 8 is missing GND connection..

eT