Hi
This error refers to: Identifier Does Not Match SOP Class is specified in Chapter 4 of the DICOM Standard:
This may be happening because one of the tags is empty or does not match, for example:
0008,0052: STUDY
0010,0020: <empty>
0020,000D: 1.4.5.6.43.232323.232323
A first recommendation would be to review the "DICOM Conformance Statement" also in another forum I found this reference DCM4CHEE:
"... The A900 error is "Data Set Does Not Match SOP Class" (from the DICOM standard). So, probably something in the anonymization is removing data that identifies what this file actually is. As others have mentioned, you'll have to look at the server logs to know what it is complaining about specifically ..."
Regards