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My simulation can't work with AC input currents, and I can't figure out why

Ghilain Pujol
Prodigy 60 points
Other Parts Discussed in Thread: TINA-TI

Hi,

I recently designed a circuit which can measure current on TINA-TI (I joined the TINA file). I would like to measure currents from 5uA to 200mA, and the OpAmp I used are chosen because of the ultra low consumption they offer. 
When I run the simulation with DC currents (low currents like 50uA or huge currents like 100mA), it works. But when I try AC simulations, even with a low range (0-4mA triangular signal, 100Hz), I receive a "convergence problem". 

Can you help me to figure out why ? Did I forget any OpAmp rule or something else ? 


Regards, 


Ghilainshunts_real.TSC