# Unknown Error with Rescript **URL:** https://forum.qiime2.org/t/unknown-error-with-rescript/19229 **Category:** Library Support **Created:** [April 15, 2021, 11:22am UTC](https://forum.qiime2.org/t/unknown-error-with-rescript/19229 "2021-04-15T11:22:05Z") **Posts on this page:** 1 **Showing post:** 2
### Author: ![SoilRotifer](https://forum.qiime2.org/user_avatar/forum.qiime2.org/soilrotifer/32/21071_2.png) [@SoilRotifer](https://forum.qiime2.org/u/SoilRotifer) #### Post date: [April 15, 2021, 2:23pm UTC](https://forum.qiime2.org/t/unknown-error-with-rescript/19229/2 "2021-04-15T14:23:37Z")
This is likely related to issues beyond our control, as you've encountered before here: > [@Error while getting plenty of data from NCBI](https://forum.qiime2.org/t/error-while-getting-plenty-of-data-from-ncbi/17635/3): > > It looks like you figured this out as per: Your next error: can be problematic to figure out. There are many "out of our hands" reasons that fetching data from NCBI can fail: I'd suggest trying to add more selective terms to your query, or try to download in batches. This is a great place to start: Good luck! Again, the help text warns of this: > [@RESCRIPT error: Download did not finish. Reason unknown](https://forum.qiime2.org/t/rescript-error-download-did-not-finish-reason-unknown/18928/7): > > @avtober, I forgot to mention that you should be aware that the help text also has other helpful information, e.g.: Please be aware of the NCBI Disclaimer and Copyright notice ([Policies and Disclaimers - NCBI](https://www.ncbi.nlm.nih.gov/home/about/policies/)), particularly "run retrieval scripts on weekends or between 9 pm and 5 am Eastern Time weekdays for any series of more than 100 requests". As a rough guide, if you are downloading more than 125,000 sequences, only run this method at those times... Which could also impact your abil… Specifically, note the following statement in the help text: > The NCBI servers can be capricious but reward polite persistence. If the > download fails and gives you a message that contains the words "Last > exception was ReadTimeout", you should probably try again, maybe with more > connections. --- _[View the full topic](https://forum.qiime2.org/t/unknown-error-with-rescript/19229)._