Missing error message caused by trivial bug
Error message from DmsDataset::registerDataset() is missing the important part.
In src/OpenVDS/IO/DmsIoFactories/DmsIoManagerFactory.cpp
Line 200: responseData = std::move(request->m_uploadHandler->responseData);
Line 204: respons_str.insert(...); // access request->m_uploadHandler->responseData
The bug is also copy-pasted into DmsDataset::lockDataset().