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export node temperature using udf

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Old   June 19, 2022, 09:42
Default export node temperature using udf
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Hiya, I am modelling a transient case with two phases, and I would like to know the temperature development of the nodes in a certain thread. I used udf to export the coordinates of the wanted nodes successfully. However, I had some problems when I tried to export the temperature. I defined the field variable name using the following lines:

char *what = "temperature";
Node_Function_Values(d, what);

And I tried to obtain the temperature value using NODE_VALUE(v). But it reports as follows when I tried to print the temperature value.

Error: floating point exception
Error Object: #f

The fl process could not be started.

What is the possible reason which would cause this?

Is it possible that the field variable name that I am using is not right, since it is a multiphase case. How can I know the list of field variable names that I can use in the function Node_Function_Values(d, what); for a multiphase case.

Many thanks for your time.
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