Message type: E = Error
Message class:  CNV_INDX - Messages for conversion of INDX-like tables 
Message number: 227
Message text: Conv.-relev. field &1 of component &2 of RELID &3 marked as 'Excluded'
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 CNV_INDX227 indicates that a conversion-relevant field in a specific component of a release ID (RELID) has been marked as "Excluded." This typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or the SAP S/4HANA Migration Cockpit.
Cause: Field Exclusion: The field in question has been explicitly marked as excluded from the conversion process. This could be due to various reasons, such as: The field is not relevant for the migration. The field may contain data that is not compatible with the target system. The field is not required in the new system or has been deprecated.
Configuration Issues: There may be configuration settings in the migration tool that dictate which fields are included or excluded during the conversion. Data Model Changes: Changes in the data model between the source and target systems may lead to certain fields being excluded.
Solution: Review Exclusion Settings: Check the configuration settings of the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_INDX226 Type of component &1 (RELID &2, version &3) not defined
What causes this issue?  Component &V1& of RELID &V2& (version &V3&) was marked for conversion. However its type has not been ...
CNV_INDX225 Type &1 of component &2 (RELID &3, version &4) not found in DDIC
What causes this issue?  Component &V2& of RELID &V3& (version &V4&) was marked for conversion. However its type &V1& ...
CNV_INDX228 Field &1 of component &2 of RELID &3 (structure &4) unknown
What causes this issue?  Field &V1& of component &V2& (RELID &V3&) has been makred for conversion. However structure of this c...
CRM_BUPA_BSP012 Customizing entry in table &1 missing for &2 &3
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.