Usage problem of saved neural network

I have used nnstart to predict future values of my time-series data, what is succeded, and I saved the network to .m file, what I can't use for further use for similar data. The automatically generated script works if the final line is outputs = train(net,inputs,targets,inputStates,layerStates); but is not working with the saved net instead of train, even not with the data the saved network trained with. So I tried just simply to replace the

outputs = train(net,inputs,targets,inputStates,layerStates);

to

load('mynet', 'net');  
outputs = net(inputs,inputStates,layerStates);

or even

outputs = net(inputs,inputStates,layerStates,targets);

but not works, even not for the same sample data that it used for the train. The code was:

inputSeries = pollutionInputs;
targetSeries = pollutionTargets;

inputDelays = 1:2;
feedbackDelays = 1:2;
hiddenLayerSize = 10;
load('mynet', 'net')
[inputs,inputStates,layerStates,targets] = preparets(net,inputSeries,{},targetSeries);
outputs = net(inputs,inputStates,layerStates);

Where the final line produces the error:

Output argument "data" (and maybe others) not assigned during call to "C:\Program
Files\MATLAB\R2012b\toolbox\nnet\nnet\@network\sim.m>simData".

Error in network/sim (line 291)
  [data,err] = simData(net,X,Xi,Ai,T,EW);

Error in network/subsref (line 17)
     otherwise, v = sim(vin,subs{:});

Error in narx2 (line 71)
outputs = net(inputs,inputStates,layerStates);

What could cause the problem, and how I could use the saved and loaded network for new datas?

Thank you in advance!

Answer 1

[Greg Heath]

1. Check the loaded net to make sure it has all the correct properties

net = net % NO SEMICOLON!

2. Sequentially remove ending semicolons to make sure the command line outputs at each stage makes sense.

Hope this helps.

Thank you for formally accepting my answer

Greg

[Roland Kilik]

Starting from your advice (however I already examined the command line output of net before) it seems to work. At least, net = net produced only "[1x1 network]", but net=load('mynet', '-mat') netin=net.mynet seems to work, as it displays all the struct of the newrok

Thank you!