"A simulation error has occurred. Would you like to run the Convergence Assistant to attempt to resolve this problem automatically?"

[lucasherler]

Hi guys,

this is my first post here and I'm familiar with Multisim on a basic level.

I created an adder circuit with LM324AD but I am getting the error:

"A simulation error has occurred. Would you like to run the Convergence Assistant to attempt to resolve this problem automatically?"

The convergence assistant is able to solve the problem, but it is unable to fix this circuit. 

I don't know what do to anymore. Could you guys help me out?

I'm sending the ms file and the png file