# Group file if already start with contigs

**URL:** <https://forum.mothur.org/t/group-file-if-already-start-with-contigs/2029>\
**Category:** Commands in mothur\
**Created:** [September 16, 2014, 12:07pm UTC](https://forum.mothur.org/t/group-file-if-already-start-with-contigs/2029 "2014-09-16T12:07:01Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![svazquez](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@svazquez](https://forum.mothur.org/u/svazquez)\
**Post date:** [August 30, 2019, 4:50pm UTC](https://forum.mothur.org/t/group-file-if-already-start-with-contigs/2029/6 "2019-08-30T16:50:17Z")

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Hi Pat

I had posted that in a new trhead (uncategorized) and now I changed it to Commands in Mothur ( [I need help working with MrDNA service sequences, providing R1 and R2 files both with barcodes?](https://forum.mothur.org/t/i-need-help-working-with-mrdna-service-sequences-providing-r1-and-r2-files-both-with-barcodes/20080)

I have the fastqs but with reads with barcode, both fwd and rev, in both R1 and R2 files and I don’t know how to use the make.contigs command.  
I also have a full fasta file with the contigs to start at screen.seqs but I don’t know how to creat the groups file in that case.

I’d very much appreciate help to start following the SOP and process the sequences.

Thank you!

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