Random number generation requires too many iterations

I am running simulations in Anylogic and try to calibrate the following distribution :

Jump = normal(coef1, coef2, -1, 1);

However I keep getting the following message as soon as I start the calibration (experimentation) : "Random number generation requires too many iterations (> 10000)".

I tried to replace -1 and 1 by other values and keep getting the same thing. I also tried to change the bounds of coef1 and coef2 and put things like[0,1] but I still get the same error.

I don't get it. Any ideas ? Thanks !