Number of validation checks in neural network training window

Line 1 - net.divideFcn = 'dividerand'; Line 2 - [trainInd,valInd,testInd] = dividerand(400,0.7,0.15,0.15);

I was wondering why the validation checks will not run in the training window, but when I erased line 2, the validation checks run.

Thank you.

[Greg Heath]

Insufficient information. Post your code.