No, nothing in dberror.txt; nothing obvious in the server logs either.
The package in question contains a large number of elements with linked documents. The XML file is 58,997,116 bytes, and if imported into a local .EAP the EAP is 41,961,472 bytes. Deleting the package from the model and running 'Get All Latest' again produces the same error on the next large package - there are about 4000 packages in the model, though we're trying to split it into smaller chunks, and eight of them are above 8MB as XML, the largest few being 57,618, 20,988, 17,648, 12,745, and 12,147 KB.
Moving one of the requirements with a linked document into its own package and exporting that to XMI, that too fails to import with 'network error'. The linked document consists of two page-sized bitmaps, is 4,977,424 bytes base 64, which is around 3 and a half megabytes binary.