Reference to non-existent field 'WFDB_CUSTOMLIB'

[ghania ghania]

help me

>> wfdbdemo

Reading samples ECG signal from MIT-BIH Arrhythmia Database

Reference to non-existent field 'WFDB_CUSTOMLIB'.

Error in getWfdbClass (line 34)

javaWfdbExec=javaObject('org.physionet.wfdb.Wfdbexec',commandName,config.WFDB_CUSTOMLIB);

Error in rdsamp (line 88)

    [javaWfdbExec,config]=getWfdbClass('rdsamp');

Error in wfdbdemo (line 12)

[ecg,Fs,tm]=rdsamp('mitdb/100',1,N);