# Recognizing paired collection for deep arg in galaxy europe server

**URL:** <https://help.galaxyproject.org/t/recognizing-paired-collection-for-deep-arg-in-galaxy-europe-server/18076>\
**Category:** usegalaxy.eu support\
**Tags:** troubleshooting, collection-shape\
**Created:** [June 17, 2026, 6:33pm UTC](https://help.galaxyproject.org/t/recognizing-paired-collection-for-deep-arg-in-galaxy-europe-server/18076 "2026-06-17T18:33:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Varnika\_D](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/varnika_d/32/8778_2.png) [@Varnika\_D](https://help.galaxyproject.org/u/Varnika_D)\
**Post date:** [June 17, 2026, 6:33pm UTC](https://help.galaxyproject.org/t/recognizing-paired-collection-for-deep-arg-in-galaxy-europe-server/18076/1 "2026-06-17T18:33:10Z")

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I transferred Bowtie2 unaligned read pairs (fastqsanger.gz) from the us site to Europe site by exporting and importing a history. I built a paired collection but DeepARG short reads says ‘No compatible dataset pair dataset collections available.’ I also tried flattening the collection and rebuilding it but cannot select individual datasets from inside a collection to rebuild pairs. How do I get DeepARG to recognize my paired collection on europe server?

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**Author:** ![igor](https://avatars.discourse-cdn.com/v4/letter/i/dec6dc/32.png) [@igor](https://help.galaxyproject.org/u/igor)\
**Post date:** [June 24, 2026, 2:52am UTC](https://help.galaxyproject.org/t/recognizing-paired-collection-for-deep-arg-in-galaxy-europe-server/18076/2 "2026-06-24T02:52:02Z")

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Hi @Varnika_D

I’ve completed bowtie2 job on collection of PE data, just one sample, with additional outputs (mapped and unmapped reads), archived the history and imported it into Galaxy Europe. I don’t see any issue with the paired collection of unmapped reads. The original history is on Galaxy Australia, but that should not make any difference. Here is a link to the exported history if you want to try history import: [https://usegalaxy.org.au/api/short\_term\_storage/e3e1e7dd-860d-4a41-ac23-95ddeaac6477](https://usegalaxy.org.au/api/short_term_storage/e3e1e7dd-860d-4a41-ac23-95ddeaac6477)

History size is just over 1 Gb, the transfer should not take long time.

I am confused with “I built a paired collection but DeepARG short reads says ‘No compatible dataset pair dataset collections available.’”

Do you have a collection of original reads (input for Bowtie2)?  
The error message points on issue with creation of collection. Try Advanced Build List option.

Kind regards,

Igor