parse error with interpreting UDF
This is my first UDF, and I am having trouble to interpret it into Fluent. Fluent shows the following error, but I don't know what is wrong.
Error: H:\airfoil_flow\setup_test9_UDF\time_average_press ure_coeff.c: line 23: parse error. Error: H:\airfoil_flow\setup_test9_UDF\time_average_press ure_coeff.c: line 23: f_loop_last: undeclared variable See below for the UDF. I am doing unsteady flow around a 3D airfoil, and want to use this UDF to calculate the timeaveraged pressure coefficient on the airfoil surface. /************************************************** **************************/ /* UDF to compute timeaveraged pressure coefficient */ /************************************************** **************************/ /* be sure to allocate at least two UDM*/ #include "udf.h" int n=0; /* number of timestep */ int zone_ID=5; /* zone ID of airfoil surface */ DEFINE_EXECUTE_AT_END(time_avr_PC) { Domain *domain = Get_Domain(1); Thread *t = Lookup_Thread(domain, zone_ID); real p_ref=0, den_ref=1.225, u_ref=21.911; /* reference pressue, reference density and reference velocity */ real q_ref=1/2*den_ref*u_ref*u_ref; /* reference dynamic pressure */ face_t f; n++ begin_f_loop(f,t) { F_UMDI(f,t,0)+= F_P(f,t); F_UDMI(f,t,1)=(F_UMDI(f,t,0)/n  p_ref)/(q_ref); } end_f_loop(f,t) } Thanks for any suggestion! 
I got it. I miss the ; behind n++.
and I also fix the typo in line 25 and 26: F_UMDI to F_UDMI. This is the new version of it. /************************************************** **************************/ /* UDF to compute timeaveraged pressure coefficient */ /************************************************** **************************/ /* be sure to allocate at least two UDM*/ #include "udf.h" int n=0; /* number of timestep */ int zone_ID=5; /* zone ID of airfoil surface */ DEFINE_EXECUTE_AT_END(time_avr_PC) { Domain *domain = Get_Domain(1); Thread *t = Lookup_Thread(domain, zone_ID); real p_ref=0, den_ref=1.225, u_ref=21.911; /* reference pressue, reference density and reference velocity */ real q_ref=1/2*den_ref*u_ref*u_ref; /* reference dynamic pressure */ face_t f; n++; begin_f_loop(f, t) { F_UDMI(f,t,0) += F_P(f,t); F_UDMI(f,t,1) = (F_UDMI(f,t,0)/n  p_ref)/(q_ref); } end_f_loop(f, t) } But I still have problem. Fluent shows error as following while interpreting. Anyone knows what it means? Error: Set_Thread_Variables: wta(real) Error Object: ((constant . 1) (profile "" "")) 
I got it. it is bacause I read the case and data files into older version of fluent.

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