Fix cancelling "Unknown Route" when section is deleted.

advtrains_interlocking/routesetting.lua

@@ -234,6 +234,17 @@ function ilrs.cancel_route_from(sigd)
 			atwarn("Failed to cancel route, no TCBS at",c_sigd)
 			return false
 		end
+		
+		--atdebug("cancelling",c_ts.route.rsn)
+		-- clear signal aspect and routesetting state
+		c_tcbs.route_committed = nil
+		c_tcbs.aspect = nil
+		c_tcbs.routeset = nil
+		c_tcbs.route_auto = nil
+		c_tcbs.route_origin = nil
+		
+		advtrains.interlocking.update_signal_aspect(c_tcbs)
+		
 		c_ts_id = c_tcbs.ts_id
 		if not c_tcbs then
 			atwarn("Failed to cancel route, end of interlocking at",c_sigd)
@@ -248,16 +259,6 @@ function ilrs.cancel_route_from(sigd)
 			return false
 		end
 		
-		--atdebug("cancelling",c_ts.route.rsn)
-		-- clear signal aspect and routesetting state
-		c_tcbs.route_committed = nil
-		c_tcbs.aspect = nil
-		c_tcbs.routeset = nil
-		c_tcbs.route_auto = nil
-		c_tcbs.route_origin = nil
-		
-		advtrains.interlocking.update_signal_aspect(c_tcbs)
-		
 		c_ts.route = nil
 		
 		if c_ts.route_post then

advtrains_interlocking/tcb_ts_ui.lua

@@ -613,9 +613,8 @@ function advtrains.interlocking.show_signalling_form(sigd, pname, sel_rte)
 			end
 		elseif sigd_equal(tcbs.route_origin, sigd) then
 			-- something has gone wrong: tcbs.routeset should have been set...
-			atwarn("Signal",tcbs.signal_name,"- Unknown route set. Route is being cancelled.")
+			form = form.."label[0.5,2.5;Inconsistent state: route_origin is same TCBS but no route set. Try again.]"
 			ilrs.cancel_route_from(sigd)
-			return
 		else
 			form = form.."label[0.5,2.5;Route is set over this signal by:\n"..sigd_to_string(tcbs.route_origin).."]"
 			form = form.."label[0.5,4;Wait for this route to be cancelled in order to do anything here.]"