Traceback (innermost last):
  File "/home/l2j/server/gameserver/data/jscript/blacksmith/1012_upgrade/__init__.py", line 441, in onEvent
TypeError: unsupported operand type(s) for +: 'str' and 'int'

        at org.python.core.Py.TypeError(Py.java:143)
        at org.python.core.PyObject._add(PyObject.java:1968)
        at data.jscript.blacksmith.1012_upgrade$py.onEvent$6(/home/l2j/server/gameserver/data/jscript/blacksmith/1012_upgrade/__init__.py:441)
        at data.jscript.blacksmith.1012_upgrade$py.call_function(/home/l2j/server/gameserver/data/jscript/blacksmith/1012_upgrade/__init__.py)
        at org.python.core.PyTableCode.call(PyTableCode.java:217)
        at org.python.core.PyTableCode.call(PyTableCode.java:437)
        at org.python.core.PyTableCode.call(PyTableCode.java:333)
        at org.python.core.PyFunction.__call__(PyFunction.java:195)
        at org.python.core.PyMethod.__call__(PyMethod.java:99)
        at org.python.core.PyObject.__call__(PyObject.java:615)
        at org.python.core.PyObject._jcallexc(PyObject.java:2678)
        at org.python.core.PyObject._jcall(PyObject.java:2710)
        at org.python.proxies.data.jscript.blacksmith.1012_upgrade$Quest$219.onEvent(Unknown Source)
        at net.sf.l2j.gameserver.model.quest.Quest.notifyEvent(Quest.java:187)
        at net.sf.l2j.gameserver.model.actor.instance.L2PcInstance.processQuestEvent(L2PcInstance.java:1242)
        at net.sf.l2j.gameserver.clientpackets.RequestBypassToServer.runImpl(RequestBypassToServer.java:151)
        at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePacket.java:59)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:595)