Proteus Error "too many iterations without convergence"

[Black-Bone]

Hi there, I just would like to design a non inverting summer using OP27,
but when I try to simulate, the error keep display

GMIN step failed,
source failed,
too many iterations without convergence,
Real time simulation failed to stop

How could I solve this problem?
Anyone helps me please?

Thanks

View attachment AD620.zip

 

[#include]

Re: Proteus Error "too many iterations without convergence"

hii

values of AD620 input voltage is not true
change the values and try again

 

[Black-Bone]

Re: Proteus Error "too many iterations without convergence"

hii

values of AD620 input voltage is not true
change the values and try again

Thanks for your reply, but I do not understand why the values of AD620 is not ture.
I tried to simulate AD620 before, using the same amount of input voltage, and each output is 1.96V which is reasonable.