How to calibrate Neural Network model in SPSS

[usman crs]

I've my dependent variable and 40 independent variables when I run ANN in SPSS using multi-layer preciptron it giving me predicted values over date duration. Every times, whenever I run ANN in SPSS its give different results. I want to find optimum predicted values in results. Is there any code though I run ANN multiple times and set my RMSE as parameter to select optimum calibration of ANN? 

I'll be very thankful for your kind favor?

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Have a nice day

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Regards;

MUHAMMAD USMAN SALEEM

Research Officer (RS & GIS)

Directorate General of Agriculture

Crop Reporting Service, HQ Lahore

Government of the Punjab