Hi Christoph,
two little observations that might help you to improve your queries:
new ClientQuery(xQueryUpdate, SESSION,
SESSION.getOutputStream()).close();
You need to execute your query, otherwise, this will be a no-op operation:
ClientQuery cq = SESSION.query(xQueryUpdate); cq.execute(); cq.close();
// System.out.println(new
XQuery(xQueryUpdate).execute(CONTEXT));
In this line, you are a circumventing the client/server context, which could lead to your error message.
If you manage to create a minimized example, that’d be helpful.
Best, Christian