"Falsche Route" - means "wrong selection", easy spoken... as nemeza said - are u sure that u chose the right BETRIEBSHOF file?
example, for the original (not modified) Spandau 89 map for regular service (day)
the LINIE should be entered 09200 (says 92 in the LINE section)
pressing ROUTE 01 - 10 will choose the right fare... take a look on the handbook or the map, which is included. example here: on line 92: for ROUTE Freudstraße to Stadtgrenze type "01", for the other direction "02". its easy, everything is noted in the manual so far.
Only the 92E LINIE uses ROUTE "05" up to "12",
and the 13N (the night line) uses ROUTE "01" and "02" too.