[kinook]

I would recommend something more like:

If Step.Property("wait") Then
  ' if waiting, there is no process id, just store an empty string
  vbld_TempMacros().Add "Child_ID", ""
Else
  vbld_TempMacros().Add "Child_ID", vbld_TempMacro("RUNPROGRAM_PROCESSID").Value
End If