I am trying to install Magento2 version 1.0.0-beta.

I followed instructions about installing sample data from: http://devdocs.magento.com/guides/v2.0/install-gde/install/sample-data.html

I enabled sample data before installing Magento and at the end of installation, I got the following error:

Error during sample data installation: Source class "\Magento\SampleData\Model" for "Magento\SampleData\Model\Logger" generation does not exist

I then tried installing sample data after installing Magento. I am getting the following error while installing sample data after installing Magento:

[InvalidArgumentException] There are no commands defined in the "sampledata" namespace.

  • use the master branch instead of develop branch
    – Mukesh
    Commented Aug 27, 2015 at 9:00
  • Just found the same issue in Magento Version 2.3.4 Edition Enterprise
    – diazwatson
    Commented Aug 13, 2020 at 22:25

2 Answers 2


Did you download version 1.0.0-beta from the releases page (or master branch), or off of the current develop branch?

My understanding is that the develop branch is not stable/sample data won't work, but it should be fine if you're using the official beta1 release. You can find that here: https://github.com/magento/magento2/releases

  • git branch shows * 1.0.0-beta. I am using the 1.0.0-beta from the releases page. Commented Aug 21, 2015 at 6:01

Had to delete old magento2 files and directory & redo the whole thing.

  • Deleted the whole magento2 directory
  • Cloned magento2 again
  • Enabled sample data before installing Magento2
  • Installed Magento2
  • Finally, done!

Magento2 installed successfully with sample data.

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