query on CTF software!!!

[Muthuraman Muthuraman]

Hello

For the Beamformer source analysis, do we need the CTF software
because when i am trying out the tutorial in beamforming

Matlab
>>freq=19.0;
>>Ncycles=10;
>>dTimeWin=Ncycles/freq;
>>cfg=[];
>>cfg.dataset='Subject01.ds';
>>cfg.channel={'MEG' 'STIM'};
>>cfg.trialdef.excludeConditions={'BAD'};
>>cfg.trialdef.includeTrigger=3;
>>cfg.trialdef.prestim=0.1+dTimeWin;
>>cfg.trialdef.poststim=-0.1;
>>datapre=preprocessing(cfg);

CTF_READ_RES4 [v  1.12]
....done (  0.67 sec)

i get the error

??? Error using ==> read_fcdc_header
could not read CTF res4 header file

Error in ==> preprocessing at 263
hdr = read_fcdc_header(cfg.headerfile);


with regards
muthu