“Unable to update API – connection to runtime destination has failed” with XSL Transform Policy

Hi all,

lately I stumbled on an issue that took me a while to track down.

In an API Proxy, I was configuring an XSL Transform policy. This policy requires a resource to work, and the policy points toward that resource.

For instance:

<XSL async="true" continueOnError="false" enabled="true" xmlns="http://www.sap.com/apimgmt">
     <!-- The XSLT file to be used for transforming the message. -->
     <ResourceURL>xsl://myXSL</ResourceURL>
     <!-- Contains the message from which information needs to be extracted -->
     <Source>response</Source>
</XSL>

Do you spot the issue in the configuration above?

Yes, the file name extension is missing!

When Saving and Updating the API proxy, you will get the following error:

This error message is a little misleading.

So be careful to correctly enter the file name, with the file extension:

<XSL async="true" continueOnError="false" enabled="true" xmlns="http://www.sap.com/apimgmt">
     <!-- The XSLT file to be used for transforming the message. -->
     <ResourceURL>xsl://myXSL.xsl</ResourceURL>
     <!-- Contains the message from which information needs to be extracted -->
     <Source>response</Source>
</XSL>

Hope this helps!

Sven

EDIT: this error also occurs when you simply misspell your XSL transformation policy, ie. when XSL Transform policy can’t find the file you have specified.