Hi,
I am stumped by these error messages.
I have created an event receiver through comtypes.client.GetEvents and
the event routines are called and work,
but in the mean time messages like this are generated:
Event PLCSimStateChanged(<comtypes.client._events.EventReceiver object
at 0x01E7CF90>, 31758856, u'STOP')
Traceback (most recent call last):
File "\loewis\25\python\Modules\_ctypes\callbacks.c", line 216, in
'converting callback result'
TypeError: int expected instead of NoneType instance
Exception in <bound method EventReceiver.handler of
<comtypes.client._events.EventReceiver object at 0x01E7CF90>> ignored
The first two lines are regular output from ShowEvents, which I have
running as well, the other ones (" File ....") are error message.
The corrsponding event function looks like this:
def PLCSimStateChanged(self, this, NewState):
self.logger.log("Event: PLCSimStateChanged: %s\n" % NewState)
return 0
for a template from GetModule like this:
COMMETHOD([helpstring(u'Fired when a new PLC switch state is
detected.')], HRESULT, 'PLCSimStateChanged',
( [], BSTR, 'NewState' )),
There are two more observations:
- The address in "<bound method EventReceiver.handler of
<comtypes.client._events.EventReceiver object at 0x01E7CF90>>" does is
reported equal for another event in the same event receiver.
- I tried varying the event function a little (returning 1, returning
None). When returning None, the messages get to look like this:
Traceback (most recent call last):
File "\loewis\25\python\Modules\_ctypes\callbacks.c", line 216, in
'converting callback result'
TypeError: int expected instead of NoneType instance
Exception in <bound method PlcSimEvents.PLCSimStateChanged of
<__main__.PlcSimEvents instance at 0x01E873C8>> ignored
Event PLCSimStateChanged(<comtypes.client._events.EventReceiver object
at 0x01E7BF90>, 31758856, u'STOP')
Traceback (most recent call last):
File "\loewis\25\python\Modules\_ctypes\callbacks.c", line 216, in
'converting callback result'
TypeError: int expected instead of NoneType instance
Exception in <bound method EventReceiver.handler of
<comtypes.client._events.EventReceiver object at 0x01E7BF90>> ignored
i.e. the same trailer, but a header is being added.
Anyone have any idea what to do about this?
Len remmerswaal
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