Answers.Body: <p>You can not run Commerce 1 on Craft 3.</p>
  
  <p>Commerce was completely re-written for Craft 3 compatibility.  Indeed the final release of Commerce 2 actually requires Craft 3.1.</p>
  
  <p>That said, your license for Commerce 1 should work for Commerce 2 once you have that installed but note there is a lot more to upgrading sites to Craft 3/Commerce 2 than just installing the new versions - there are extensive changes needed to both - including template and fundamental changes to custom plugins if you have written any of those.</p>
  
  <p>See:</p>
  
  <ul>
  <li><a href="https://docs.craftcms.com/v3/upgrade.html" rel="nofollow noreferrer">https://docs.craftcms.com/v3/upgrade.html</a></li>
  <li><a href="https://docs.craftcms.com/commerce/v2/changes-in-commerce-2.html" rel="nofollow noreferrer">https://docs.craftcms.com/commerce/v2/changes-in-commerce-2.html</a></li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-01-29T23:44:55.600Z
Answers.LastActivityDate: 2019-01-29T23:44:55.600Z
Answers.UserDisplayName: Jeremy Daalder
Body: <p>Folks:</p>
  
  <p>I've got an e-commerce site that I'm upgrading. I've upgraded to Craft 3 and can reach the CP and the home page.</p>
  
  <p>This site is tightly integrated with Commerce 1. When I visit the plug-in page, Commerce is listed but "missing". I've attempted to claim the license (using the license number listed on the plug-ins page) but the license number is not recognized.</p>
  
  <p>Do I have any options other than purchasing a complete new license? Is there a way to use Commerce 1 with Craft 3?</p>
  
Tags: <plugin-craftcommerce><plugin-craftcommerce2>
Title: Upgrading Commerce 1 to Commerce 2
ThreadText: # Upgrading Commerce 1 to Commerce 2
  
  (Asked by: username_0 on 2019-01-29)
  
  Folks:
  
  I've got an e-commerce site that I'm upgrading. I've upgraded to Craft 3 and can reach the CP and the home page.
  
  This site is tightly integrated with Commerce 1. When I visit the plug-in page, Commerce is listed but "missing". I've attempted to claim the license (using the license number listed on the plug-ins page) but the license number is not recognized.
  
  Do I have any options other than purchasing a complete new license? Is there a way to use Commerce 1 with Craft 3?
  
  **Tags:** plugin-craftcommerce, plugin-craftcommerce2
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2019-01-29. Score: 1 | Accepted answer
  
  You can not run Commerce 1 on Craft 3.
  
  Commerce was completely re-written for Craft 3 compatibility. Indeed the final release of Commerce 2 actually requires Craft 3.1.
  
  That said, your license for Commerce 1 should work for Commerce 2 once you have that installed but note there is a lot more to upgrading sites to Craft 3/Commerce 2 than just installing the new versions - there are extensive changes needed to both - including template and fundamental changes to custom plugins if you have written any of those.
  
  See:
  
  * <https://docs.craftcms.com/v3/upgrade.html>
  * <https://docs.craftcms.com/commerce/v2/changes-in-commerce-2.html>
  
  
  ---
  
  