SAP Message WMCV503 - Distribution was not started (recipient system &1 not available)

Diagnosis
ALE Customizing is not properly set for the distribution of Value andQuota Scale data. No recipient system could be determined.

System Response
The data cannot be carried out.

Procedure
Please inform your system administrator.

Procedure for System Administration
For information on maintaining ALE Customizing, see Help -> SAP Library-> Cross-Application Components -> Business Framework Architecture ->Application Link Enabling -> ALE Quickstart