[Bugzilla user: am@orthanc.team]
[Bugzilla date: 2024-01-22T16:36:45+00:00]

@Thibault:  We had the same kind of errors with a Télémis PACS and we fixed it in 1.12.2 (commit: https://orthanc.uclouvain.be/hg/orthanc/rev/ac68a4383e51).  

The negotiation were not consistent and we finally decided to force a renegotiation even if the PACS previously claimed it would not support that StorageClassUID/TransferSyntax type.  It happened that when asking for that tuple a second time, it accepts it.

Could you give 1.12.2 a try and come back to us if you still have the issue ?  If the issue happens again, please record the DICOM negotiation in TRACE mode.

HTH,

Alain.