Tjoelker found this error: http://forum.simutrans.com/index.php?topic=15152.msg155404#msg155404I (http://forum.simutrans.com/index.php?topic=15152.msg155404#msg155404I)
Scenario: http://www.mediafire.com/file/2xb9z0ey7zuik5x/Tutorial-0.2-traduc.zip
I can not find this error or replicate. :o
(http://i599.photobucket.com/albums/tt76/tjoeker/Error_1.png)
Then Tjoeker should update the program and all the provided files (i.e. download complete nightly package - not only executable)