When attempting to upload a file, you may occasionally see the following error message:
! At least one forward file needs to be uploaded for the sample.
This usually happens when your forward and reverse files were not auto-grouped correctly. To resolve this error you simply need to drag the file labeled R1 to the "Forward" section, like below:
Tip: In the context of FASTQ sequencing files, R1 and R2 typically refer to the "read 1" and "read 2" files generated from paired-end sequencing. R1 contains the forward reads, and R2 contains the reverse reads.
Once you dragged the R1 file to the "forward" folder, the error message disappears. You can now continue uploading your samples.
