Multisim Guitar Pedal Help!

[dockchrlie]

Hello! I'm having a problem with my Multisim circuit. Whenever I simulate the circuit and throw switch S1A, Multisim says there is an error and it will exit the simulation.

Help appreciated!

This is my multisim circuit:

This is the circuit I'm trying to create:

 

[KrisBlueNZ]

What error does it report?

There's nothing inherently wrong with that circuit.

 

[dockchrlie]

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

 

[KrisBlueNZ]

I Googled that error message and got several hits. One of them suggested using the convergence assistant, and listed some possible causes.