Undeclared symbol name

Hello I introduced the K_p variable in var and predetermined section but it still gives this error. Why?
ERROR: NDF.mod: line 3, cols 25-31: Undeclared symbol name: K_p

NDF.mod (3.0 KB)
NDF_steadystate.m (2.7 KB)


You need to declare K_g and K_p in the var section first before you declare them as predetermined variables again in line 3 again.

I did. Look at the first line but there is still this problem.

No, the var statement in the first line does not mention K_g and K_p.