# Room for improvement when joining multiple HTs?

**URL:** https://discuss.hail.is/t/room-for-improvement-when-joining-multiple-hts/2278
**Category:** Hail Query & hailctl
**Created:** [September 30, 2021, 7:55pm UTC](https://discuss.hail.is/t/room-for-improvement-when-joining-multiple-hts/2278 "2021-09-30T19:55:20Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![tpoterba](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/tpoterba/32/61_2.png) [@tpoterba](https://discuss.hail.is/u/tpoterba)
#### Post date: [November 23, 2021, 4:18pm UTC](https://discuss.hail.is/t/room-for-improvement-when-joining-multiple-hts/2278/8 "2021-11-23T16:18:59Z")

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Hi Mike,  
So sorry we didn’t get back to you on this.

I think the exome sites must be a super old file that was written before indices were introduced. This should succeed though – what’s the stack trace on the unindexed error?

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