HELP: Error in equation U,V,WMOM; ENTH
 

Dear All: There is error information: ****Error: NaN value trapped in equation UMOM

j= 1, i1= 1, iclmap(i1)= 118738

i2= 125, iclmap(i2)= 120093

af(1,j) =NaN ; af(2,j) = NaN

..... I use STAR_CD 4.02, does anyone know the possible reasons of it? how to solve it? Hope your answers or suggestions. Thank you in advance.