Error: checkdata at 381 This function requires raw data as input

[Natalia Grion]

Dear all,
         I have this error when running freqanalysis:
??? Error using ==> checkdata at 381
This function requires raw data as input.
My data comes from a preprocessing procedure where i just append daily
sessions with 8 channel lfp recordings and several trials from the same
subject) and it has this shape:

        hdr: [1x1 struct]
      label: {8x1 cell}
      trial: {1x349 cell}
       time: {1x349 cell}
    fsample: 2003
        cfg: [1x1 struct]

when i run checkdata alone I obtain the message i expect:
B =  checkdata( data, 'datatype', 'raw', 'feedback', 'yes',
'hasoffset','yes');
the input is raw data with 8 channels and 349 trials
This error message sounds odd to me as I never had this problem in the past.
I changed to Matlab 2009a in a 64bit win system (Could this info help to
solve the problem?)
Any idea?
Thanks in advance.
Natalia




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