I want to stop the analysis (LSTOP=1) when the temperature of the bottom nodes of an element is also equal to 500 degrees.

There are two subroutines DFLUX and URDFIL. As the DFLUX subroutine is requested in the LOAD module if  "user-defined load" is selected, similarly is there anything required to include in the input file to invoke the URDFIL subroutine?  I am only using restart output requests using the interaction 'model change'.

step=coupled thermal-electric 

output variable is NT (RECORD 201)

section is solid homogenous (not shell)

element type is DC3D8E 

Abaqus ​​​​​​​