The cause is pretty obvious. That DICOM library doesn't support that particular kind of DICOM file.
There's not much you can do about it ... unless you are prepared to enhance the library yourself.
But I think you have probably made a mistake in setting up your instrument to generate DICOM files with JPEG compression. JPEG is lossy, and best practice is to capture and store images with the best resolution feasible. If you need to downgrade resolution to reduce bandwidth, it would be better to
- save a high resolution DICOM,
- convert the DICOM to a low resolution JPG, and
- send the JPEG.