General information about the function
You can use this function to convert the position of a unit to the map coordinates.
Let's say you've a unit at position [0,0,0] the function would then convert this to Aa00 or whatever the map coordinates are.
With it you shouldn't encounter any problems. Using it in Sahrani or Rahmadi doesn't make any difference, on both it works.
Check the readme and demo mission for more information in case you need it.