Message type: E = Error
Message class:  PRC_CNV - Messages for Conversion Engine 
Message number: 015
Message text: Cannot read table EWUKEYS in database - table is not available
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 PRC_CNV015 indicates that the system is unable to read the table EWUKEYS from the database because the table is not available. This error typically occurs during data migration or conversion processes, particularly when using SAP's data migration tools. Causes: Table Does Not Exist: The most straightforward cause is that the table EWUKEYS does not exist in the database. This could be due to an incomplete installation or configuration of the relevant SAP components. Database Connection Issues: There may be issues with the database connection, preventing the SAP system from accessing the required tables. Authorization Issues: The user executing the transaction may not have the necessary authorizations to access the table. Incorrect Configuration: The system may not be properly configured to recognize or access the table, especially if it is part of a specific module or add-on. Data Migration Tool Issues: If you are using a specific data migration tool, it may not
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
PRC_CNV014 Call of getPhysicalValue() failed with UnitName: &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
PRC_CNV013 Call of getQuantityUnit() failed with UnitName: &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
PRC_CNV016 Problem while converting Alternative unit to Base Quantity : &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
PRC_CNV017 Unable to set the Product Quantity
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.