Qiime2 Metadata file error

Hello everyone. I am using the Qiime2 software on the edge bioinformatic interface. When I try to run my analysis I get an error relating to my metadata mapping file that says: "Metadata mapping file: file PCR-Blank-6_S96_L001_R1_001.fastq.gz,PCR-Blank-6_S96_L001_R2_001.fastq.gz does not exist". I have attached a photo of my mapping file, is it set up correctly? I have triple checked for typos and there does not appear to be any errors or spaces.


Here is the input I used:
Amplicon Type: 16s V3-V4 (SILVA)
Reads Type: De-multiplexed Reads
Directory: MyUploads/
Metadata Mapping File: MyUploads/mapping_file.xlsx

Barcode Fastq File: [empty]
Quality offset: Phred+33
Quality Control Method: DADA2
Trim Forward: 0
Trim Reverse: 0
Sampling Depth: 10000

Thank you!

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Hello!

I would start by matching SampleID, real sample names and absolute paths to the files. For example, you have "PCR-Blank_6" in the SampleID and "PCR-Blank-6" in the path. Check the names of your fastq files.

Best,

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Thank you for your reply! I double checked my files and they match the file path ("PCR-Blank-6"). I changed the SampleID to match and still receive the same error message.

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Thank you for providing additional screenshots.
In your folder "MyUploads", all the files have "fastq" format, while in the metadata file "fastq.gz". I assume that gzipping fastq files to fastq.gz will solve the issue.

Best,

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That also doesn't work. I even tried removing the .gz from my metadata file.

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I am not very familiar with EDGE Bioinformatics, which you are running, but looking into their tutorial they require a mapping file, in which each sample is present once:

While in your screenshot you have each sample duplicated (2 rows per sample). I think that you are mixing the mapping file they are requiring and one that is required for Qiime2 to import files.
I suggest to reformat your mapping file according to their documentation, or switch to native Qiime2 installation.

Best,

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I found their pipeline!

Looks like it uses Qiime 2019.1, which is 5 years old

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Thank you so much! This worked! I appreciate the help :slight_smile:

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