That is because your Origin version is too old. Try this way, go to menu Window->Script window. Paste the following script, highlight all and press enter key to run.
n = int(wks.nrows/10);
range r2 = col(B);
for (int i = 1; i <= n; i++)
{
range r1 = Col(A)[10*i-9:10*i];
r2[i] = total(r1);
}
James