[YSim]

I have written a UDF to define profil heat transfer coefficient at boundary condition
When i interpret it, It shows the following Error in Line - 14.
"invalid type conversion: double -> pointer to char"
Please Suggest me something how to remove this Error?
Best regards
The UDF is as follows
#include"udf.h"
#definehg 30
#definehd 30
DEFINE_PROFILE(htc, thread, position)
{
real t = CURRENT_TIME;
face_t f;
cell_t c1;
begin_f_loop (f, thread)
{
if (t < 10.)
F_PROFILE(f, thread, position) = hg;
else
F_PROFILE(f, thread, position) = hd * (1-C_LIQF(c,t)) + hd * C_LIQF(c,t);
}
end_f_loop (f, thread)
}