[BitBucket user: asch99]
[BitBucket date: 2017-03-14.15:27:35]

As extra information, running a storescp instead of Orthanc does not give rise to this error. I tried the binary versions of 3.6.0 and 3.6.1 as well as compiling myself from the dcmtk-3.6.0 sources used in the compilation of Orthanc. Somehow the error already originates in the ASC_receiveAssociation() call in acceptAssociation() of CommandDispatcher.cpp, which results in an assoc with empty DULparams.