[Wien] Volume Optimization question

[Da Gao]

Dear WIEN2k users,

When I am doing volume optimization of a SP-SO calculation, I need  cp 
$i.clmsum aa.clmsum
But I got a message said $i.clmsum doesn't exit. I am wondering how to
produce these $i.clmsum according to my volume change at constant a:b:c,
for example from -50 to 50% with a step of 5.

Thanks a lot for your input.

Da