Run SSH command workflow with output variables

Hi,

I am trying to run a cmd to execute a script on the source host to stop application with input of the list of VM names.

vms = System.getModule("com.vmware.library.vc.cluster").getAllVMsOfCluster(cluster) ;
var vmtostop = sudo -u applicationx/stop.sh (vms) ;

on the WF Run SSH Command, i've set cmd local param to source param "vmtostop"

but the first script does not accept the 2nd line of vmtostop = script.

any hints would be appreciated. many thanks