Using Answer Key Histories

If you get stuck, you can first check your history against an exemplar history, from your tutorial.

First, import the target history.

  1. Open the link to the shared history
  2. Click on the new-history Import history button on the top right
  3. Enter a title for the new history
  4. Click on Import

Next, compare the answer key history with your own history.

You can view multiple Galaxy histories at once. This allows to better understand your analyses and also makes itv possible to drag datasets between histories. This is called “History multiview”. The multiview can be enabled either view History menu or via the ACtivity Bar:

  1. Enabling Multiview via History menu is done by first clicking on the galaxy-history-optionsHistory options” drop-down and selecting galaxy-multihistoryShow Histories Side-by-Side option”:

    Enabling side-by-side view using History Options menu

  2. Clicking the galaxy-multihistoryHistory Multiview” button within the Activity Bar:

    Enabling side-by-side view using Activity Bar

You can compare there, or if you’re really stuck, you can also click and drag a given dataset to your history to continue the tutorial from there.

There 3 ways to copy datasets between histories

  1. From the original history

    1. Click on the galaxy-gear icon which is on the top of the list of datasets in the history panel
    2. Click on Copy Datasets
    3. Select the desired files

    4. Give a relevant name to the “New history”

    5. Validate by ‘Copy History Items’
    6. Click on the new history name in the green box that have just appear to switch to this history
  2. Using the galaxy-columns Show Histories Side-by-Side

    1. Click on the galaxy-dropdown dropdown arrow top right of the history panel (History options)
    2. Click on galaxy-columns Show Histories Side-by-Side
    3. If your target history is not present
      1. Click on ‘Select histories’
      2. Click on your target history
      3. Validate by ‘Change Selected’
    4. Drag the dataset to copy from its original history
    5. Drop it in the target history
  3. From the target history

    1. Click on User in the top bar
    2. Click on Datasets
    3. Search for the dataset to copy
    4. Click on its name
    5. Click on Copy to current History

You can also use our handy troubleshooting guide.

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.

  1. Expand the red history dataset by clicking on it.
    • Sometimes you can already see an error message here
  2. View the error message by clicking on the bug icon galaxy-bug

  3. 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
    • For more information about specific tool errors, please see the Troubleshooting section
  4. 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
  5. Ask for help!

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