DICOM @ OFFIS

oh yes sorry ds->findAndGetFloat64Array(DCM_ImagePositionPatient,position);

Hello I have a problem with dicom tag array:

DcmDataset *ds = dicom.getDataset();
double *position;
ds->findAndGetFloat64(DCM_ImagePositionPatient,position);

findAndGetFloat64 return the pointer position as NULL.
I have this problem with all tag array.

Thanks a lot in advantage.