Fix an issue with old symbols paths

gns3server/controller/node.py

@@ -204,6 +204,10 @@ class Node:
 
     @symbol.setter
     def symbol(self, val):
+        # No abs path, fix them (bug of 1.X)
+        if not val.startswith(":") and os.path.abspath(val):
+            val = os.path.basename(val)
+
         self._symbol = val
         try:
             self._width, self._height, filetype = self._project.controller.symbols.get_size(val)

gns3server/controller/symbols.py

@@ -70,7 +70,12 @@ class Symbols:
         return directory
 
     def get_path(self, symbol_id):
-        return self._symbols_path[symbol_id]
+        try:
+            return self._symbols_path[symbol_id]
+        # Symbol not found refresh cache
+        except KeyError:
+            self.list()
+            return self._symbols_path[symbol_id]
 
     def get_size(self, symbol_id):
         try: