Error saving PET data with dicominfo

I'm trying to adjust and save a set of dicom images from a PET scan, but i keep getting the next error message, does anyone know how to solve this? I use the following line to write the data,

if true
dicomwrite (A, strcat(fpath, fname), info);
end

After which i get the following error message, when i run it without the info it works fine, but i want to keep my dicominfo.

Error using dicom_prep_metadata (line 92) Unsupported SOP class (1.2.840.10008.5.1.4.1.1.128) in full verification mode. Consider using 'CreateMode' with a value of 'Copy'. Type help dicomwrite for more details.

Error in dicom_create_IOD (line 26) metadata = dicom_prep_metadata(IOD_UID, metadata, X, map, options.txfr, dictionary);

Error in dicomwrite>write_message (line 262) [attrs, status] = dicom_create_IOD(SOP_UID, X, map, ...

Error in dicomwrite (line 199) [status, options] = write_message(X, filename, map, metadata, options);