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Module Not Found​

ModuleNotFoundError: No module named 'xxxx'

If your script runs into this issue, there's a few likely scenarios:

  1. You haven't provided the right External Package Dependendencies on the language packages panel or through a requirements.txt file.
  2. You have provided a package incorrectly, either by:
    1. Including a typo in the package name.
    2. Not formatting the version number properly.
    3. Listing a version that doesn't exist.
    4. Listing a version that's not compatible with Python 3.7.
  3. When pulling code from our Git sync, you've simultaneously provided Python Packages in the UI and a requirements.txt file in your repository. You'll need to use one or the other. Providing both results in two separate pip install commands which can result in package installation issues.
  4. You've provided a package that has additional system package dependencies. For example:
  • psycopg2 requires that you install libpq-dev as a system package. Alternatively, you can use psycopg2-binary to avoid the extra dependency.
  • spark requires that you install default-jre and scala as system packages.
  • JayDeBeApi requires that you install default-jre as a system package.

To test this out on your local machine, you can spin up a new virtual environment and pip install packages one by one. If one throws an error, that's your culprit.


If pip runs into a single error during installation, it will fail to install all remaining packages listed, so the the package listed in the error may not be the one causing an issue.

No such file or directory​

Beginning of Output​

If this error appears printed at the beginning of your output and your Vessel appears to never run, the likely culprit is due to the File to Run field either containing, or not containing, the correct folder name.

  1. If you're using a Git Connection, make sure to follow these instructions to reference the file name correctly.
  2. If you're not storing files in a folder structure, make sure the File to Run field only contains the file name.
  3. If you are using a folder structure, make sure the File to Run field contains the exact location of the file.

Middle/End of Output​

If this error appears towards the end of your output and your Vessel appears to have run partially, the likely culprit is that your code is referencing the wrong file name or location.

It is sometimes difficult to remember all of the files that would be available to your Vessels in a Fleet. We recommend this guide to list all available files so you can better visualize the file names.

Miscellaneous Issues​

If you are having weird performance issues in Shipyard, we have a few steps you can try to rectify those issues.

  1. Perform a hard refresh of your browser. Click your specific browser below for the key strokes needed to perform a hard refresh.
  • Windows: Control (Ctrl) + Shift + R on your keyboard.
  • Mac: Command (⌘) + Shift (⇧) + R on your keyboard.
  1. Some browser extensions can cause weird bugs to occur. Try disabling extensions or browsing in Incognito/Private Browsing mode (where extensions should be disabled) to see if that fixes your issue.
  2. Try a different browser.