--- /home/yonatyt/simu-git/simutrans-master/dataobj/scenario.cc	2021-08-21 10:37:45.000000000 -0400
+++ /home/yonatyt/simu-git/files/scenario.cc	2021-08-21 19:16:43.306367000 -0400
@@ -541,6 +541,21 @@
 
 }
 
+const char* scenario_t::is_link_go_to_pos(koord3d pos)
+{
+	if (env_t::server) {
+		// networkgame: allowed
+		return NULL;
+	}
+	// call script
+	if (what_scenario == SCRIPTED) {
+		static plainstring msg;
+		const char *err = script->call_function(script_vm_t::FORCE, "is_link_go_to_pos", msg, pos);
+
+		return err == NULL ? msg.c_str() : NULL;
+	}
+	return NULL;
+}
 
 const char* scenario_t::get_error_text()
 {

--- /home/yonatyt/simu-git/simutrans-master/dataobj/scenario.h	2021-08-21 10:37:45.000000000 -0400
+++ /home/yonatyt/simu-git/files/scenario.h	2021-08-21 19:16:34.822128000 -0400
@@ -438,6 +438,15 @@
 	 */
 	const char* is_convoy_allowed(const player_t* player, convoihandle_t cnv, depot_t* depot);
 
+	/**
+	 * Called when player click link in scenario windows.
+	 *
+	 * @param pos coordinate go to in link
+	 *
+	 * @return null if allowed, an error message otherwise
+	 */
+	const char* is_link_go_to_pos(koord3d pos);
+
 	/// @return debug dump of forbidden tools
 	const char* get_forbidden_text();
 	/// @}

--- /home/yonatyt/simu-git/simutrans-master/gui/scenario_info.cc	2021-08-21 10:37:45.000000000 -0400
+++ /home/yonatyt/simu-git/files/scenario_info.cc	2021-08-21 19:16:50.497643000 -0400
@@ -95,6 +95,9 @@
 	gui_frame_t::draw(pos, size);
 }
 
+// implementation in simtool.cc
+void open_error_msg_win(const char* error);
+
 bool scenario_info_t::action_triggered( gui_action_creator_t *comp, value_t v)
 {
 	if (  comp == &tabs  ) {
@@ -122,6 +125,11 @@
 							p = welt->lookup_kartenboden(k)->get_pos();
 						}
 						welt->get_viewport()->change_world_position( p );
+
+						const char* err = welt->get_scenario()->is_link_go_to_pos( p );
+						if (err) {
+							open_error_msg_win(err);
+						}
 					}
 				}
 			}

--- /home/yonatyt/simu-git/simutrans-master/script/api/api_skeleton.cc	2021-08-21 10:37:45.000000000 -0400
+++ /home/yonatyt/simu-git/files/api_skeleton.cc	2021-08-21 19:16:55.791957000 -0400
@@ -277,6 +277,18 @@
 register_function("is_convoy_allowed");
 
 /**
+ * Called when player click link in scenario windows.
+ *
+ * @param pos coordinate go to in link
+ *
+ * @return null if allowed, an error message otherwise
+ * @typemask string(coord3d)
+ * @ingroup scen_skel
+ * @ingroup quick_return_func
+ */
+register_function("is_link_go_to_pos");
+
+/**
  * Initializes the tool.
  * @returns true upon success.
  *