Message type: E = Error
Message class:  SADL_GW_DT_CDS - Messages CDS Checks 
Message number: 063
Message text: Prefix &1 for Association &2 is longer than &3 characters.
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message SADL_GW_DT_CDS063 indicates that there is an issue with the length of the prefix for an association in a Core Data Services (CDS) view. Specifically, the prefix for the association exceeds the maximum allowed length, which is defined by the system.
Cause: The error occurs when the prefix used for an association in a CDS view exceeds the maximum character limit set by the SAP system. This can happen if: The naming convention used for the association is too long. The association is defined in a way that results in a longer prefix than allowed.
Solution: To resolve this error, you can take the following steps: Check the Association Definition: Review the CDS view where the association is defined. Look for the association that is causing the error and check its prefix. Shorten the Prefix: If the prefix is longer than the allowed limit (usually 30 characters), consider renaming the association or its components to
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SADL_GW_DT_CDS062 Association name &1 must be identical to &2.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SADL_GW_DT_CDS061 CDS view &1 is not a child of &2.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SADL_GW_DT_CDS064 Prefix &1 for Association &2 is used more than once.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SADL_GW_DT_CDS065 Prefix is missing for Association &1.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.