Hello

I have used Ansys UDF tutorial in order to simulate surface reaction. I use interpreted UDF for simulation. these terms aren't clarified in fluent console and I encountered this errors :

Error: CUsers/nejadsm1/AppData/Local/Temp/udf111.c.18560.0.c: line 33: TP_MATERIAL: undeclared variable

I tried to check which terms causes this problem, it was for the terms 

UNIVERSAL_GAS_CONSTANT , DPM_CHAR_FRACTION(p), DPM_VOLATILE_FRACTION(p)

What's the reason for these errors ? I have brought udf file at the attachment