isnin:=proc(A)
local i,j,f,B:
B[1] := 0:
for i from 1 to numccs do

f:=Size([entries(B)][i][1],2); <---

for j from 1 to f do
if Equal([entries(A)][1][1],[entries(B)][i][1][j]) then
return false:
end if:
end do:
end do:
return true:
end proc:
 

Do you know why maple wont evaluate f?

If it's not something obvious context is below...

If there's some equivalent to a dynamic array in maple I'd really like to know!