--- a/src/ai/api/ai_error.hpp	Fri Apr 04 10:43:13 2008 +0000
+++ b/src/ai/api/ai_error.hpp	Sun Apr 06 12:26:40 2008 +0000
@@ -23,6 +23,7 @@
 		ERR_CAT_GENERAL,  //!< Error messages related to general things.
 		ERR_CAT_VEHICLE,  //!< Error messages related to building / maintaining vehicles.
 		ERR_CAT_STATION,  //!< Error messages related to building / maintaining stations.
+		ERR_CAT_BRIDGE,   //!< Error messages related to building / removing bridges.
 
 		/**
 		 * DO NOT USE! The error bitsize determines how many errors can be stored in
@@ -52,7 +53,7 @@
 		ERR_LOCAL_AUTHORITY_REFUSES,                  // [STR_2009_LOCAL_AUTHORITY_REFUSES]
 
 		/** The piece of infrastructure you tried to build is already in place */
-		ERR_ALREADY_BUILT,                            // [STR_1007_ALREADY_BUILT]
+		ERR_ALREADY_BUILT,                            // [STR_1007_ALREADY_BUILT, STR_5007_MUST_DEMOLISH_BRIDGE_FIRST]
 
 		/** Area isn't clear, try to demolish the building on it */
 		ERR_AREA_NOT_CLEAR,                           // [STR_2004_BUILDING_MUST_BE_DEMOLISHED, STR_5007_MUST_DEMOLISH_BRIDGE_FIRST, STR_300B_MUST_DEMOLISH_RAILROAD, STR_300E_MUST_DEMOLISH_AIRPORT_FIRST, STR_MUST_DEMOLISH_CARGO_TRAM_STATION, STR_3047_MUST_DEMOLISH_TRUCK_STATION, STR_MUST_DEMOLISH_PASSENGER_TRAM_STATION, STR_3046_MUST_DEMOLISH_BUS_STATION, STR_306A_BUOY_IN_THE_WAY, STR_304D_MUST_DEMOLISH_DOCK_FIRST, STR_4800_IN_THE_WAY, STR_5804_COMPANY_HEADQUARTERS_IN, STR_5800_OBJECT_IN_THE_WAY, STR_1801_MUST_REMOVE_ROAD_FIRST, STR_1008_MUST_REMOVE_RAILROAD_TRACK, STR_5007_MUST_DEMOLISH_BRIDGE_FIRST, STR_5006_MUST_DEMOLISH_TUNNEL_FIRST]