# Unable to save dataset attributes **URL:** \ **Category:** usegalaxy.eu support\ **Tags:** troubleshooting\ **Created:** [September 24, 2026, 8:59am UTC](https://help.galaxyproject.org/t/unable-to-save-dataset-attributes/18416 "2026-09-24T08:59:07Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![bsegers](https://avatars.discourse-cdn.com/v4/letter/b/3da27b/32.png) [@bsegers](https://help.galaxyproject.org/u/bsegers)\ **Post date:** [September 24, 2026, 8:59am UTC](https://help.galaxyproject.org/t/unable-to-save-dataset-attributes/18416/1 "2026-09-24T08:59:07Z")
I’m trying to change the format of a dataset obtained with AdapterRemoval. When I want to assign a new datatype from fastaqsanger to fasta, I’ve got the message : unable to save dataset attributes. I did this modification previously and it worked. Can you tell me why it is not working anymore ? ---
**Author:** ![jennaj](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/jennaj/32/27_2.png) [@jennaj](https://help.galaxyproject.org/u/jennaj)\ **Post date:** [September 24, 2026, 5:08pm UTC](https://help.galaxyproject.org/t/unable-to-save-dataset-attributes/18416/2 "2026-09-24T17:08:09Z")
> [@bsegers](#): > > When I want to assign a new datatype from fastaqsanger to fasta Welcome @bsegers I am going to assume that “fastaqsanger” means “fastqsanger” which is a type of `fastq` data. You should be able to convert the datatype from `fastq` to `fasta` with one of the tools in the tool panel (search with the datatypes) or you can do this under the Edit Attributes functions (using a default converter with no specified runtime options). - [FAQ: Converting the file format](https://galaxyproject.github.io/training-material/faqs/galaxy/datasets_convert_datatype.html) - [FAQ: Converting the datatype of a collection](https://galaxyproject.github.io/training-material/faqs/galaxy/collections_convert_datatype.html) Please give this a try! 🙂