Anders,

Thanks for confirming. So can you at least get into the details of the dataset rather than viewing the information? Specifically here:

https://labkey01.usit.uio.no/labkey/study/TNS%20%28visit%29/datasetDetails.view?datasetId=5002

and here to edit the definitions:

https://labkey01.usit.uio.no/labkey/study/TNS%20%28visit%29/editType.view?datasetId=5002

I believe you may have a duplicate date column in your dataset, which is causing the error. If we can get access to editing the definitions, you should be able to remove/modify the bad field so you can access the data.

Regards,

Jon