Message type: E = Error
Message class:  CNV - Conversion: Messages for Conversion Services (CNCC) 
Message number: 603
Message text: There is no data for display in Phase "&1" (yet)
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 CNV603 "There is no data for display in Phase '&1' (yet)" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This message indicates that there is currently no data available for display in the specified phase of the migration process.
Cause: No Data Loaded: The most common cause is that the data has not yet been loaded into the system for the specified phase. This can happen if the migration process is still ongoing or if there was an issue during the data loading phase. Incorrect Phase: The phase specified in the error message may not have any data associated with it, either because it is not applicable or because the data has not been processed yet. Data Filtering: There may be filters applied that prevent any data from being displayed, even if it exists in the system. Technical
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV602 Job name and/or job count for entry invalid => funct. cannot be executed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV601 Funct.can only be executed for entry w. status "&1" (&2); see long text
 For information on the different statuses, see <D:DE.CNV_ICON>valid status</>Error message extract from SAP system. Copyright SAP SE. ...
CNV604 Package &1 contains no data
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV605 This function is not yet implemented
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.