# bug in screen.seqs command in v. 1.22?

**URL:** <https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713>\
**Category:** mothur bugs\
**Created:** [November 28, 2011, 7:04pm UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713 "2011-11-28T19:04:36Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![hkallen](https://avatars.discourse-cdn.com/v4/letter/h/2acd7d/32.png) [@hkallen](https://forum.mothur.org/u/hkallen)\
**Post date:** [November 28, 2011, 7:04pm UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713/1 "2011-11-28T19:04:36Z")

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I am running mothur 1.22 on a 64-bit PC. I have a large dataset (\>1 million seqs, 70 000 unique seqs) that refuses to complete the screen.seqs command. mothur runs it for \>24 hrs, then closes without any information in the log file. However, screen.seqs will run on the same dataset in mothur v. 1.20. Any tips?  
Thanks!  
Heather

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**Author:** ![westcott](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.mothur.org/westcott/32/18_2.png) [@westcott](https://forum.mothur.org/u/westcott)\
**Post date:** [November 30, 2011, 11:57am UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713/2 "2011-11-30T11:57:57Z")

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Could you send the input files and logfile to [mothur.bugs@gmail.com](mailto:mothur.bugs@gmail.com)?

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**Author:** ![westcott](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.mothur.org/westcott/32/18_2.png) [@westcott](https://forum.mothur.org/u/westcott)\
**Post date:** [January 3, 2012, 7:59pm UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713/3 "2012-01-03T19:59:58Z")

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This is a bug related to the Windows paralellization and will be fixed in version 1.23.0.

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**Author:** ![jiaco](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jiaco](https://forum.mothur.org/u/jiaco)\
**Post date:** [January 10, 2012, 8:05am UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713/4 "2012-01-10T08:05:37Z")

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Is this also related? Processors has been tested for values 1, 2, 20 (22 available) and all end with the same result.  
Datafile is 10G, but I was about to test with a smaller dataset.

Otherwise, is you recommendation to just use a previous mothur version for the screen.seqs command?

Thanks

```nohighlight
mothur > screen.seqs(fasta=input.clean.unique.align, name=input.clean.names, group=input.groups, start=1044, end=6421, minlength=200, maxlength=400, processors=20)

[arnist:04731] ***Process received signal***
[arnist:04731] Signal: Segmentation fault (11)
[arnist:04731] Signal code: Address not mapped (1)
[arnist:04731] Failing at address: 0xfc8000
[arnist:04731] [0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x10060) [0x7fe928600060]
[arnist:04731] [1] /lib/x86_64-linux-gnu/libc.so.6(+0x138864) [0x7fe928389864]
[arnist:04731] [2] mothur(_ZN17ScreenSeqsCommand9driverMPIEiiRP11ompi_file_tS2_S2_RSt6vectorIySaIyEERSt3setISsSt4lessISsESaISsEE+0x497) [0xa0de37]
[arnist:04731] [3] mothur(_ZN17ScreenSeqsCommand7executeEv+0xbd4) [0xa1d674]
[arnist:04731] [4] mothur(_ZN14InteractEngine8getInputEv+0x715) [0x6c3b75]
[arnist:04731] [5] mothur(main+0xab9) [0x475e49]
[arnist:04731] [6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7fe92827230d]
[arnist:04731] [7] mothur() [0x478731]
[arnist:04731] ***End of error message***
Segmentation fault

```

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<div class="post-metadata">

**Author:** ![westcott](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.mothur.org/westcott/32/18_2.png) [@westcott](https://forum.mothur.org/u/westcott)\
**Post date:** [January 10, 2012, 2:02pm UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713/5 "2012-01-10T14:02:28Z")

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Can you try it with version 1.23.0?

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**Author:** ![jiaco](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@jiaco](https://forum.mothur.org/u/jiaco)\
**Post date:** [January 10, 2012, 2:19pm UTC](https://forum.mothur.org/t/bug-in-screen-seqs-command-in-v-1-22/713/6 "2012-01-10T14:19:16Z")

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Okay, 1.21 was just sitting there doing nothing.  
But with 1.23.0 it works fine for me!

Thanks