Set cnt-limit to 20. This allows a bigger time-range for tariff, which

have in principle no time-limit.

library/src/calculator_functions.cpp

@@ -458,7 +458,7 @@ Calculator::ComputeDurationFromCost(Configuration *cfg,
                                                         arg(cost).arg(nettoParktimeForCost);
 
     int cnt = 0;
-    while (++cnt < 10 && netto_parking_time_in_minutes < nettoParktimeForCost) {
+    while (++cnt < 20 && netto_parking_time_in_minutes < nettoParktimeForCost) {
         // qCritical() << __func__ << ":" << __LINE__ << "cnt [" << cnt;
 
         brutto_parking_time_in_minutes = free_parking_time_in_minutes + netto_parking_time_in_minutes;