Question about WFDB toolbox for matlab?

When I use the funtion 'rdann' of WFDB toolbox (for example:[time, m, atrtimed, annotd] = rdann('afdb/04126','atr',[],1000000);), I get one error message 'Could not get record header information to find stop time'. And a dialog box shows 'init: can''t open header for record 04126'. How can I solve the problem?

[Walter Roberson]

Is that http://physionet.org/physiotools/matlab/wfdb-app-matlab/ ?

[Zhao Hongyang]

Yes, it is. But do you know how to solve the problem mentioned above.

[Zhao Hongyang]

[Zhao Hongyang]

I have solved it!!!

[Walter Roberson]

What was the solution?

[Zhao Hongyang]

I found the name of the first parameter of the function must be same as that of the '.hea' file.