Hi Saurabh,It seems "var1" is in "d=1" and "var2" is in "d=2".If it is true you have made a mistake in your code.I think,"let s1=var1[d=2,k=1,l=1:139]" should be "let s1=var1[d=1,k=1,l=1:139]"And"let r1=var2[d=1,gx=var1,gy=var1]"should be "l et r1=var2[d=2,gx=var1,gy=var1]"Please let us know if that works.Vivek