Error with setting VecStim population parameters

[Katherine Doxey]

Hi,

I am attempting to input poisson distributed spike trains to synapses in a single cell model by creating a VecStim population. I have tried using the spikePattern property and createPoissonPattern with the spkTimes properties. With both, I get an error while running my simulation. However, the simulation completes and the error message is Error while setting  'spikePattern' param to VecStim[0] or Error while setting  'spkTimes' param to VecStim[0]. Does anyone have an idea as to what could be causing this error or what I should look into further? I would also welcome any suggestions on how to best implement poisson spike trains in NetPyNE. Thank you!

Here is my code for both methods:

# spikePattern

netParams.popParams['vecstim'] = {

'cellModel': 'VecStim',

'numCells': 1,

'spikePattern': {'type': 'poisson',

'start': 10,

'stop': -1,

'frequency': 10}

}

# createPoissonPattern

poisson_params = {'start': 0,

'stop': sim_dur,

'frequency': 10}

spkTimes = list(cell.createPoissonPattern(poisson_params, h.Random()))

netParams.popParams['vecstim'] = {

'cellModel': 'VecStim',

'numCells': 1,

'spkTimes': spkTimes

}