"Bad file format: missing StudyInstanceUID, SerieInstanceUID or SOPInstanceUID" howto accept

Hi all,
some of my dcm file are not accepted because field StudyInstanceUID is empty, is there a way (JSON) to make orthanc less stringent ?

Thx

No. If your DICOM files do not contain a StudyInstanceUID, they are really invalid and there’s really nothing Orthanc can do against it. The StudyInstanceUID is the unique identifier of the study and it must be there.
(http://book.orthanc-server.com/dicom-guide.html#dicom-identifiers)