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The MDG rule derivation standard code strictly turns custom triggered error or warning messages of derivation BAdI customer code into info message type. In some situations the derivation BAdI is a perfect location for doing not only derivations but also other checks and data transformations including throwing warning or even error messages (for stopping the MDG process).



Solution approach

Implement a so-called “implicit enhancement” at the very end of the relevant method IF_USMD_RULE_SERVICE~DERIVE_ENTITY of class CL_USMD_RULE_SERVICE. The disadvantage of an “implicit enhancement” is the dependency on future code-changes of the original code – however this is quite unlikely. The advantage is definitely the simplicity of this solution approach.


A suggestion for such an implementation approach:

“””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””””$”$\SE:(1) Class CL_USMD_RULE_SERVICE, Interface IF_USMD_RULE_SERVICE, Method DERIVE_ENTITY, End                                                             A
*$*$-Start: (1)———————————————————————————$*$*
* this DERIVE method turns all W messages into info message
* in special case that messages out of class ZZ_MSG_CLASS are used, warn messages should remain warnings
loop at et_message into ls_message where msgid eq ‘ZZ_MSG_CLASS’ and msgty eq ‘I’.
if lf_error = ‘X’ .
ls_message-msgty = ‘E’.
ls_message-msgty = ‘W’.
modify et_message from ls_message index sy-tabix.
*$*$-End:   (1)———————————————————————————$*$*



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  1. Michael Theis


    please be aware that doing this might cause inconsistencies in your data. Warnings or errors returned from the derivation method of the rule services BAdI can cause mis-behavior of the delta buffer. You might be faced with un-resolvable error messages that finally require the creation of a new change request.

    For checking data, you should always use the check methods of the rule service BAdI.

    Kind regards



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