[Pcsim-users] Problem with spike senders

[Christopher N. <cn...@it...>]

Hi,

I've tried to create a new spike source in an external module.  When
trying to connect the output of the new SpikeSender to spiking synapses
or spike recorders, I get the exception

<type 'exceptions.RuntimeError'>: PCSIM::ConstructionException in
function SingleThreadNetwork::addSpikeMessage: Specified simulation
object ((n=0,e=

occurring in:

void SingleThreadNetwork::_addSpikeMessage_(const SimObject::ID &sender,
const port_t out, const SimObject::ID &receiver, const port_t in_port,
const Time &delay)

It appears as though the dynamic_cast on line 170 of
SingleThreadNetwork.cpp is returning null, however I can achieve a naive
cast:

(SpikeSender*) src_obj

in a debugger and call the appropriate SpikeSender members (so the
object is the right type).

I've simplified the class and tested that the problem still occurs; the
simplified version is attached along with a python script that produces
the error.  Any thoughts would be most appreciated.

Cheers,
Chris.