why ft_sourceplot doesn't work?

[Ludwing Torres]

Hello, I tried to make the example to fit dipoles explained in the page of fieldtrip:

http://fieldtrip.fcdonders.nl/example/symmetric_dipoles

in the part in which one computes the time average, using the function ft_timelockanalysis produces an error that says that the function needs the field cfg.covariancewindow:
cfg = [];
cfg.covariance = 'yes';
timelock = ft_timelockanalysis(cfg, data);

it appears to be solved when I set this to the option 'poststim' and recompute the function.

cfg.covariancewindow = 'poststim';

timelock = timelockanalysis(cfg, data);
the input is raw data with 91 channels and 1 trials
applying preprocessing options
averaging trials
averaging trial 1 of 1
Warning: Divide by zero.
> In timelockanalysis at 606

This produces the division by zero seen above, but any of the options for 
covariancewindow field result the same for this.
Then, after computing the sourceanalysis and sourcedescriptives function, I go to the part of ft_sourceplot with the same configuration as in the page, and the function produces the next error:

cfg = [];
cfg.method = 'ortho';
cfg.funparameter = 'nai';
cfg.funcolorlim = [1.6 2.2];
>> sourceplot(cfg, source);
the input is source data with 3468 positions
not plotting anatomy
no functional parameter
no masking parameter
voxel 1590, indices [9 9 6], location [-0.0 -0.0 5.0]
??? Error using ==> sourceplot at 654
no anatomy is present and no functional data
is selected, please check your
cfg.funparameter

please, if anyone know why this is happening and how to fix this, let me know.
thank you for your atention.

 		 	   		  
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