Guilin Sun
Ansys Employee

Unfortunately the seeds for FDE are random and might be machine dependent. and the back propagation modes are also physical. I could not duplicate your result:

what OS version you are using?

 

You may try to disable the "rand", or reset it like this: 

?randreset();

I do not see the necessity here using "rand".

 

I tested your script. with randreset as well as disabled "rand", they all give the same result on Win11:

 

We need to duplicate the issue if it is a bug.