The setunitpos-command does not work correctly on a unit which has no weapons.
When the unit is in unitPos "MIDDLE", it won't work to set him in unitPos "UP". He won't stand up.
Additionally, when the unit is in unitPos "DOWN", it won't work to set him in unitPos "MIDDLE". He won't get up to his knees.
Neither does the scripting command setunitPos "UP" work, nor does the unit obey the command coming from a commander.
This has potential to brake many missions (it has broken mine :) :) ).