Hi Rob,

I apologize, I was wrong in saying that the ANSYS UDF manual was no help. I eventually figured out my problem. I will snap shot the code below for other users with similar interests. Also,  /solve/set/advanced/retain-temporary-solver-mem  only works in serial, as this as well gives me a warning saying this is not compatible with parallel simulation. 


Step 1. Copy and paste ANSY UDF manual code (section 

Step 2. Enable UDS with UDM of 1 

Step 3. Turn off the UDS equation in the control 

Step 4. Extract UDS value and take the gradient of the UDS (see below)