# Predicted Interface Unknown

**URL:** <https://ask.bioexcel.eu/t/predicted-interface-unknown/3826>\
**Category:** PRODIGY\
**Created:** [July 28, 2022, 6:55pm UTC](https://ask.bioexcel.eu/t/predicted-interface-unknown/3826 "2022-07-28T18:55:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![christos-efthymiou](https://avatars.discourse-cdn.com/v4/letter/c/8edcca/32.png) [@christos-efthymiou](https://ask.bioexcel.eu/u/christos-efthymiou)\
**Post date:** [July 28, 2022, 6:55pm UTC](https://ask.bioexcel.eu/t/predicted-interface-unknown/3826/1 "2022-07-28T18:55:26Z")

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I would like to use the Prodigy-Crystal webserver to assess if certain interfaces are biological in two X-ray crystallography structures. However, after submitting various jobs on these structures assessing various interfaces, all of them say:

```auto
Prediction results
Predicted interface: Unknown

Probability of the prediction: N (biological) / / (crystallographic) (check the Method for further information)

```

Is this a valid result? For example, that the server cannot provide any indication if it is biological or crystallographic? I just find it odd that no probability is provided and that this occurred for every interface tested, so I wanted to check if there is some error or this is a reasonable result.

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**Author:** ![honoratorv](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/honoratorv/32/672_2.png) [@honoratorv](https://ask.bioexcel.eu/u/honoratorv)\
**Post date:** [July 29, 2022, 10:05am UTC](https://ask.bioexcel.eu/t/predicted-interface-unknown/3826/2 "2022-07-29T10:05:33Z")

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@christos-efthymiou thanks for reporting this issue.

There was indeed a bug in the server and it should be fixed now, please try again! 🧑🏽‍🔧