www.neuron.yale.edu

hi, problem solved: a simple copying of the vector used for recording into a new vector works.] something like: V2=new Vector() forsec injsec{ V2.record(&v(p),T) run() V3 = new Vector() V3.copy(V2) Vlist2.append(V3) } gives the real data! it seems the critical mistake was to create a new Vector ...

getting further... as soon as i leave the forsec injsec loop, the absolute object id's reference to different data. line A gives me a perfect match with the graph in injectstimrun(), whereas line B matches with teh result in the save() proc. is there any way that forsec can alter the object id's? an...

a little remark,
same thing happens when i use an array for collecting vectors.
so it's not a list problem.
is there any way that the data in the vectors could have been altered "accidentally"?
why are the id's still the same?

or maybe the graph is not showing the correct data ?

ub

Hi Ted, Many thanks for the help, the improvemnts make sense, didnt know one could use loc for any point process, not just Impedance. Why is that not in the programmers reference? Unfortuntely the problem persists even after having made the suggested modifications. Apparently squared brackets work f...

Hi, I have a strange problem with saving Vectors to Lists. I have writtten a piece of hoc iterates through different positions on a detailed morphological model's dendrite to inject current pulses through an iClamp. The idea is to run t he same cell with only one IClamp at a time recording the resul...

Hi,
Sorry took a while to get back on this.
It seems like the error occurs only with use_local_dt(1).
I am running my networks now without local dt, but just a quaestion:

Is it the case then that you are not supposed to use the local dt solver for parallel networks?

Cheers
Ulli

I will do my best to narrow down the problem.
As soon as I can reproduce the problem with a minimal version, I'll send you the files.

Cheers
Ullrich

Hi, A question about parallel Neuron: The parallel network model I simulate doesn't seem to like too big synaptic delays. I used synaptic delays up to 15 with set_maxstep(100). To be precise, there seems to be a problem with a gaba mech that I use. Below you find the error message and the respective...

Thanks, very much! I spoke to our admin and the new Neuron version will be installed "soon". But in the mean time I would need a quick hack to run my programs. This is the mod file I've written: TITLE getenv COMMENT get environment vars for parallel batch simulation ENDCOMMENT NEURON { GLO...

Hi, I have a hopefully simple question: I would like to run multiple versions of my parallel(!) network with different parameter sets. Therefore a started intance of nrn would need some kind of awareness which process it is. Multiple ideas how to realise that: Is there any way to read MPI environmen...

Hi,
I use Neuron 5.9.10 on an AMD 64bit machine running SUSE Linux 10.1.

I guess a bug in my implementation is much more likely than a Neuron bug so I keep on checking, if I don't find anything I'll send the files.

Many thanks again, Ted!

Cheers
Ullrich

Hi, a bit extra information: I did not use the cv ode in the parallel version hence the similarity of the serial version to the parallel version in the first 50 ms. So if I test the serial fixed step against the parallel fixed step, the result is exctly the same for the first 50 ms. Accordingly, usi...

Hi, I have a more general question on the ode solver in the ParalleNetManger environment in NEURON. I have "parallelised" a network model and I am quite sure that all parameter in the serial and the parallel version are identical. When I simulate the network using the parallel environment ...

hi,

i would like to save my model parameters to xml without having to use the gui modelviewer, i.e. by simply using hoc code.
is there any description, turorial on that out there? couldn't find any...

many thanks for some help!

cheers
ullrich

Well,
To answer the question myself: Obviously it didnt!
So I created a proc mkcell() and initilalised the MCellRan4 in the obfunc that returns the cell object!
Now it works!

If that helps anyone?

Cheers
Ulli