Frequently Asked Questions
Why do we use FASTQ interlacer and not the FASTQ joiner?
The reason ASaiM-MT uses FASTQ-interlacer than FASTQ-joiner for combining forward and reverse reads is because the joiner tool combines the forward and reverse read sequence together while the interlacer puts the forward and reverse read sequences in the same file while retaining the entity of each read along with an additional file with unpaired sequences and it maintains the integrity of the reads while helping us distinguish between the forward and reverse reads.
Can we use the ASaiM-MT workflow on multiple input files at the same time?
Currently, that is one of its limitations. However, Galaxy offers a workflow within workflow feature which can help process multiple files at the same time and this output can be combined into one using the
Can this ASaiM workflow be used for single-end data?
Yes, the inputs have to be changed to a single-end file rather than a paired-end.
Why don’t we perform the V-Search dereplication step of ASaiM for metatrascriptomic data?
In the metatranscriptomics data, duplicated reads are expected. And to keep the integrity of the sample, we would like to retain the reverse reads.
Tip: If a Tool is Missing
To use the tools installed and available on the Galaxy server:
- At the top of the left tool panel, type in a tool name or datatype into the tool search box.
- Shorter keywords find more choices.
- Tools can also be directly browsed by category in the tool panel.
If you can’t find a tool you need for a tutorial on Galaxy, please:
- Check that you are using a compatible Galaxy server
- Navigate to the overview box at the top of the tutorial
- Find the “Supporting Materials” section
- Check “Available on these Galaxies”
- If your server is not listed here, the tutorial is not supported on your Galaxy server
- You can create an account on one of the supporting Galaxies
- Use the Tutorial mode feature
- Open your Galaxy server
- Click on the curriculum icon on the top menu, this will open the GTN inside Galaxy.
- Navigate to your tutorial
- Tool names in tutorials will be blue buttons that open the correct tool for you
- Note: this does not work for all tutorials (yet)
- Still not finding the tool?
- Ask help in Gitter.
Tip: Troubleshooting errors
When something goes wrong in Galaxy, there are a number of things you can do to find out what it was. Error messages can help you figure out whether it was a problem with one of the settings of the tool, or with the input data, or maybe there is a bug in the tool itself and the problem should be reported. Below are the steps you can follow to troubleshoot your Galaxy errors.
- Expand the red history dataset by clicking on it.
- Sometimes you can already see an error message here
View the error message by clicking on the bug icon galaxy-bug
- Check the logs. Output (stdout) and error logs (stderr) of the tool are available:
- Expand the history item
- Click on the details icon
- Scroll down to the Job Information section to view the 2 logs:
- Tool Standard Output
- Tool Standard Error
- Submit a bug report! If you are still unsure what the problem is.
- Click on the bug icon galaxy-bug
- Write down any information you think might help solve the problem
- See this FAQ on how to write good bug reports
- Click galaxy-bug Report button
- Ask for help!