How To Fix CLB2456 - A URL could not be mapped to its external representation

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB2 - SAIL: Common messages

• Message number: 456

• Message text: A URL could not be mapped to its external representation

What causes this issue?

The mapping of a URL from internal to external representation failed.

System Response

The URL mapper was called, but could not find any mapping information in
table HTTPURLLOC for the given combination of host and port. The mapper
was informed that this situation had to be logged.
Depending on the context, this defect is the result of an exception that
interrupted the application. Especially, during the distribution of
business object notifications, the Customizing parameter determines
whether the processing is interrupted.

How to fix this error?

For the notification scenario, see instructions in the next section.

Procedure for System Administrators

For the URL mapping, table HTTPURLLOC is used as described in the
notification guide.
A new Customizing indicator, <LS>Mapping Exception</>, is available for
Customizing activity<DS> </><LS>Server Settings </>(transaction
CLB2_PLATF).
It controls error handling when mapping URL links:
If the checkbox is selected, an exception is raised when URL mapping is
not successful. The exception results in erroneous entries in the bgRFC
queue of the Gateway hub.
To prevent an exposure of your internal server IDs to the internet, you
must select this checkbox and maintain table HTTPURLLOC. To do so, run
transaction SE16 and call up table HTTPURLLOC.
Maintain table HTTPURLLOC as follows:
In the <LS>PROTOCOL </>field, enter the protocol that the external
communication uses (HTTPS in the case of SAP Jam ? use SSL whenever
possible).
In the <LS>FOR_DOMAIN </>field, enter the external representation of the
URL, for example, <LB>www.saptest.com</>.
In the <LS>APPLICATN</> field, specify the same application ID as used
in Customizing activity<LS> Application-Specific Server Assignment</>.
In the <LS>HOST </>and <LS>PORT </>fields, enter the internal proxy
information, for example, <LB>lcfsg2hd </>and <LB>8080</>.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<ZH>Notes:</>
The HTTPURLLOC entries represent an inside->out mapping that corresponds
to the outside->in mapping at your reverse proxy or web dispatcher.
You can also specify a default entry, with host and port set to *, if it
is not possible to specify all application servers at design time (for
example, due to virtualization).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB2456 - A URL could not be mapped to its external representation ?

  The SAP error message CLB2456, which states "A URL could not be mapped to its external representation," typically occurs in the context of SAP's Content Lifecycle Management (CLM) or when dealing with external content repositories. This error indicates that the system is unable to resolve a URL to the corresponding external representation, which can happen for several reasons.
  Causes:
  
  Incorrect URL Configuration: The URL being accessed may be incorrectly configured or malformed.
  Missing External Representation: The external representation that the URL is supposed to map to may not exist or may not be properly defined in the system.
  Authorization Issues: The user may not have the necessary permissions to access the external representation associated with the URL.
  Network Issues: There may be network connectivity issues preventing access to the external resource.
  System Configuration: The system may not be properly configured to handle the specific type of URL or external representation.
  
  Solutions:
  
  Check URL Configuration: Verify that the URL is correctly formatted and points to the right resource. Ensure that there are no typos or incorrect parameters.
  Verify External Representation: Check if the external representation exists in the system. If it does not, you may need to create it or correct the mapping.
  Review Authorizations: Ensure that the user has the necessary authorizations to access the external representation. This may involve checking roles and permissions in the SAP system.
  Network Troubleshooting: If the URL points to an external resource, check for any network issues that may be preventing access. This could involve checking firewalls, proxies, or other network configurations.
  System Configuration Review: Review the system settings related to external content management to ensure that they are correctly configured to handle the URL types you are working with.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Refer to the official SAP documentation for Content Lifecycle Management or the specific module you are working with for more detailed information on URL handling and external representations.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.