In Fluent’s Eulerian Wall Film model, use non-Newtonian fluid as the wall film materi
 

I am using the Eulerian Wall Film model in ANSYS Fluent. I want to set the material of the wall film to be a non-Newtonian fluid, but I have not been successful. I have tried almost all methods:

When I define the viscosity of the film material using a User-Defined Function (UDF), it compiles successfully. However, during initialization, I encounter the following error: ‘Received signal SIGSEGV.’ I can confirm that my UDF does not contain any errors.

When I use Fluent’s built-in non-Newtonian fluid material viscosity models (such as power law or kinetic theory), I get the error message: ‘Inappropriate film material viscosity method.

I would like to know if, for the Eulerian Wall Film model in Fluent, the wall film material must be constant, or if I am missing the correct approach?