When using the ALM REST Connector in Agile Requirements Designer, I am receiving the following error messages- Http:404 Unreachable. Please check your URL. 

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If you have 'qcbin' in the URL, the login will fail.

To troubleshoot any issue with the ALM REST connector, we recommend enabling logging. Directions on how to do this are listed here: https://www.ca.com/us/services-support/ca-support/ca-support-online/knowledge-base-articles.TEC1471231.html

After enabling ALM REST logging in ARD, the log file shows the following message: 

(GET) Request URL: http://alm.ca.com/qcbin/qcbin/authentication-point/authenticate 
Response URL: http://alm.ca.com/qcbin/qcbin/authentication-point/authenticate 
Response HTTP Code: 404 
HTTP ERROR 404 
Problem accessing /qcbin/qcbin/authentication-point/authenticate. 
The resource you are looking for has been removed, had its name changed, or is temporarily unavailable. 

Most likely causes: 
- The directory or file specified does not exist on the Web server. 
- The URL contains a typographical error. 
- A custom filter or module, such as URLScan, restricts access to the file. 

Things you can try: 
- Create the content on the Web server. 
- Review the browser URL. 
- Create a tracing rule to track failed requests for this HTTP status code and see which module is calling SetStatus. 
- For more information about creating a tracing rule for failed requests, http://go.microsoft.com/fwlink/?LinkID=66439 

CA Agile Requirements Designer (ARD)-Agile Designer and HP ALM REST connector

When using the ALM REST connector, the URL will have the following format: http://alm.companyname.com/

The /qcbin is added automatically in the background.

You can read more on using the ALM REST connector with ARD in the documentation links below:

• Connect to HP ALM: https://docops.ca.com/ca-agile-requirements-designer/2-5/en/integrations/integration-with-lifecycle-tools/connect-to-hp-alm
• Integrations: https://docops.ca.com/ca-agile-requirements-designer/2-5/en/integrations
• Integrations with Lifecycle Tools: https://docops.ca.com/ca-agile-requirements-designer/2-5/en/integrations/integration-with-lifecycle-tools 
• Import and Export Visual Flows: https://docops.ca.com/ca-agile-requirements-designer/2-5/en/integrations/import-and-export-visual-flows 

If you are still experiencing issues, please open a support case by going to https://support.ca.com/irj/portal/anonymous/newhome or calling support at one of these numbers http://www.ca.com/us/services-support/ca-support/contact-support.html. 

We also recommend checking out our online knowledge base for other errors/resolutions, Q&A, and how-to documents: https://www.ca.com/us/services-support/ca-support/ca-support-online/support-by-product/ca-agile-requirements-designer.html?d=t&type=Knowledge