[pakk]

Originally Posted by hitzhwan

You mean the below code you load work? Why I have some errors when I load it by the same process, what fluent edition do you use? Would you please send me your case and udf to me, I want to try more, thank you so much .
#include "udf.h"

DEFINE_PROFILE(hf_change,thread,position)
{
face_t f;
const real heat_flux1 = 0;
const real heat_flux2 = 500;
const real switch time = 0.0001;
const real time = CURRENT_TIME;
const real hf = time<switch_time?heat_flux1:heat_flux2;
begin_f_loop(f,thread)
{
F_PROFILE(f,thread,position)=hf;
}
end_f_loop(f,thread)
}

The hitzhwan of 24 December was able to load this without errors. The hitzhwan of 29 December gets errors. It's very confusing like this.

[hitzhwan]

Originally Posted by AlexanderZ

Unfortunately, I'm not able to send you any files.

This is not the problem of version, code is simple and should work in any version.

I recommend you to make new test simple geometry:
rectangular, make it solid, not fluid
make new source file (with other name) and compile it again
load and apply UDF, run transient simulation

most likely, you didn't compile the code

why to make it solid, not fluid?