On 15/07/2025 15:59, Tim McIver wrote:
I'm running version 5.1.0.  Looks like 5.4.0 is the current version. I'll update.

In the meantime before I upgrade, is there a way to stop this error? I imagine there's a file somewhere that I can delete.

Most likely, there is an entry in directory run/configuration/ (or teh area named by environment variable FUSEKI_BASE), a file called ds.ttl, because it was previously created via the UI.

For an in-memory dataset, you can simply delete that file.

    Andy


Thanks,
Tim

On 7/15/25 09:16, Andy Seaborne wrote:
Hi Tim,

Which version of Fuseki is this? Things changed recently.

Did you previously use the UI to create a "/ds" dataset?

    Andy

On 15/07/2025 13:38, Tim McIver wrote:
Hello,

I started fuseki with

fuseki-server --update --mem /ds

But on a second invocation, I get an exception:

org.apache.jena.fuseki.FusekiException: Already registered: /ds

Why can't I reuse that name? If I were not using an in-memory database, would I lose access to my data?

Tim McIver



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