C_YI in DEFINE_SOURCE

Sad Thomas :(

Hi,

I'm trying to call the mass source of a species to use as a source term. The problem exists in part of a larger code; I've included an example of the problem below.

When I run the UDF I get an access violation.

Am I right to understand that the species index i in C_YI(c,t,i) refers to the species ID in Define > Phases?

DEFINE_SOURCE(test,cell,thread,dS,eqn) real mo2; mo2 = C_YI(cell,thread,0); source=2*mo2; dS[eqn] = 0; return source;

Many thanks for any help.

Thomas