Message type: E = Error
Message class:  CNV_NCE_BAS - Number conversion engine: messages 
Message number: 015
Message text: No sufficient information for a simulation
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_NCE_BAS015 ("No sufficient information for a simulation") typically occurs during the execution of a simulation in the context of data migration or conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other conversion tools.
Cause:
The error usually indicates that the system lacks the necessary data or configuration to perform the simulation. This can happen due to several reasons, including:
Missing Data: Required data for the simulation is not available in the source system or has not been properly extracted.
Configuration Issues: The configuration settings for the migration or conversion process may not be correctly set up.
Inconsistent Data: The data in the source system may be inconsistent or incomplete, preventing the simulation from being executed.
Authorization Issues: The user executing the simulation may not have the necessary authorizations to access the required data.
Solution:
To resolve the CNV_NCE_BAS015 error, you can take the following Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_NCE_BAS014 Select only one table
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_NCE_BAS013 No tables selected
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_NCE_BAS016 No mappings values exist for object &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_NCE_BAS017 Mapping tables are inconsistent
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.