How to flatten GDS by stream out or Command

Hi,

I used follow skill but  db not flatten

procedure( flatten( lib cell view)

let((cvId)

foreach(via cvId~>vias dbFlattenInst(via 32 t nil nil nil t nil t))

foreach(inst cvId~>instance dbFlattenInst(inst 32 t nil nil nil t nil t))

);procedure

also try the command in Linux but fail 

strmout -library try -strmFile try.gds -logFile strmOut.log -summaryFile summary.log -flattenPcells -flattenVias 

(error : Command not found)

(use IC5141)

If anyone know the solution/fix for this problem, please let me know..

reguards,

Molly