Message type: E = Error
Message class:  SZDM_CC_CHKS_TITLES - Title messages related to check classes 
Message number: 018
Message text: Switch BADI impl. is not compliant to Zero Downtime Option (ZDO) rules
Error message extract from SAP system. Copyright SAP SE.
The SAP error message SZDM_CC_CHKS_TITLES018 indicates that a Business Add-In (BAdI) implementation is not compliant with the Zero Downtime Option (ZDO) rules. This typically occurs during a system upgrade or when implementing changes in a system that is intended to support zero downtime.
Cause: The error arises when the BAdI implementation does not adhere to the guidelines set forth for ZDO. Common causes include: Incompatible Code: The BAdI implementation may contain code that is not compatible with the ZDO framework, such as: Direct database updates. Use of non-transactional operations. Any operations that could lead to inconsistencies during the upgrade process. Missing Annotations: The implementation may lack the necessary annotations or configurations that indicate it is ZDO-compliant. Improper Handling of Exceptions: If the BAdI implementation does not properly handle exceptions or errors, it may lead to issues during the upgrade.
Solution: To resolve this error, you can take the following steps: Review BAdI Implementation: Check the code in the BAdI implementation for
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