Message type: E = Error
Message class:  CNV20305 - Messages for conversion packages in CO 
Message number: 450
Message text: *** Messages for set names ***
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 CNV20305450 typically relates to issues encountered during data migration or conversion processes, particularly when using SAP's tools for data transfer or transformation. This specific error message indicates that there are problems with the set names being used in the conversion process.
Cause: Invalid Set Names: The set names specified in the migration or conversion process may not conform to the expected format or may not exist in the system.
Configuration Issues: There may be configuration issues in the migration tool or the source/target systems that lead to the inability to recognize or process the set names. Data Integrity Issues: The data being migrated may have inconsistencies or integrity issues that prevent the proper mapping of set names.
Solution: Check Set Names: Verify that the set names being used in the migration process are correct and exist in the target system. Ensure that they are spelled correctly and follow the naming conventions. Review Configuration:
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20305400 *** Messages for profit centers ***
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20305351 Cycle merge is not supported.
What causes this issue?  A merge of cycles is not supported as part of a controlling area merge. Cycles which exist in the controlling areas which are...
CNV20305453 RFBLG cluster table &1 is processed cluster-optimized
What causes this issue?  The field USECLTECH indicator was not set for the cluster table &V1&. The cluster tables of a cluster should be selec...
CNV20305461 RFBLG cluster table &1 will be processed before RFBLG cluster
What causes this issue?  RFBLG cluster table &V1& will be processed before RFBLG cluster. The associated settings are added. &V1& must...
Click on this link to search all SAP messages.