Message: Failed to Download Core Library Index File.

The information in this article applies to:

DESCRIPTION

When I try to download or update library content, a message states:

• "Failed to Download Core Library Index File: _Core_Content_Index.txt, Reason: 0."
  

How can I solve this problem?

RESOLUTION

This error affects Chief Architect X14, Home Designer 2023, and newer versions. To resolve this issue, install an up-to-date Self Signed Certificate from Amazon Trust Services.  

To install an updated Self-Signed Certificate

1. Visit https://www.amazontrust.com/repository/.
   
   
   
2. Under the Certification Authorities heading, you will find a Root CAs table.
   
   
   
3. In the Self-Signed Certificate column for the top line item, click on the DER link:
   
   
   
   
   
4. Open the newly downloaded AmazonRootCA1.cer file:
   
   
   • Select it from your browser's downloads list, or
   • Open your system file explorer, navigate to your Downloads folder, and double-click on it.
   
   
   
5. In the Open File - Security Warning dialog that opens next, click the Open button.
   
   
   
   
   
6. On the General panel of the Certificate dialog, click the Install Certificate button.
   
   
   
   
   
7. In the Certificate Import Wizard:
   
   
   • Select Local Machine as the Store Location, then click Next.
     
     
     
     
   • You may be prompted with a message stating: "Do you want to allow this app to make changes to your device?" If so, click Yes to proceed.
     
     
   • Select Automatically select the certificate store based on the type of certificate, then click Next.
     
     
     
     
   • Click Finish. You should be met with a message stating: "The import was successful." Click OK on each dialog.
   
   
   
8. Now, try downloading or updating your library content again by navigating to Library> Update Library Catalogs from within your program.
   
   
   • If you are using Chief Architect, please see the Obtaining and Updating Library Content resource to learn more.
     
     
   • If you are using a Home Designer program, please see the Downloading and Updating Library Catalogs resource to learn more.