neural networking input size

While using neural network, as a classifier,after running the main program i am facing the following error

| | | _ *Error using network/sim (line 130)

Input 1 size does not match net.inputs{1}.size.

Error in ori (line 412)

simulated_output = sim(net,[meani;sd;rtvtr])* _ | | |

the input range of the three parameters given are almost in sme range.

how can i get the o/p?

[Greg Heath]

Insufficient information. It is not clear what you did.

What "main program"?

How many classes?

What is the I-H-O node topology?

[ I N ] = size(input) = ?

[ O N ] = size(target) = ?