&1: The type of element &2 must be compatible with data element &3.
Message type: E = Error
Message class: SADL_GW_DT_CDS - Messages CDS Checks
Message number: 055
Message text: &1: The type of element &2 must be compatible with data element &3.
Self-Explanatory Message
SAP has defined this message as ‘self-explanatory’ and therefore, has not provided any further details for it.
All messages in SAP have a message text (shown above). However, the message text is not always useful enough to understand or resolve the issue.
Therefore, most messages in the SAP system provide additional long text with details about what caused the issue, how it can be resolved, what actions to take or configuration changes to make, etc
Unfortunately, this specific error message does not provide such additional information.
What else can you do?
Even though this error message does not provide any useful or additional message details, you can still try to solve the issue by searching on SAP’s support portal. In many cases, there could be an SAP support note that provides further error explanations or even directions for resolving the error.
Related Error Messages
SADL_GW_DT_CDS054 CDS views cannot be analytical and transactional at the same time.
SADL_GW_DT_CDS053 CDS views with parameters are not supported.
SADL_GW_DT_CDS056 Field &1 must be exposed because it is used in annotation &2 at field &3.
SADL_GW_DT_CDS057 Where-condition in consumption view can only have operator: &1.