Message type: E = Error
Message class:  SEPM_DG - EPM: Data Generator Messages 
Message number: 016
Message text: EPM Data Generator: Number Ranges created
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 SEPM_DG016, which states "EPM Data Generator: Number Ranges created," typically indicates that there is an issue related to the number ranges used in the EPM (Enterprise Performance Management) Data Generator. This error can occur during the data generation process when the system is unable to find or allocate the necessary number ranges for the data being processed.
Cause: Number Range Not Defined: The number range for the specific object or document type may not be defined in the system. Number Range Exhaustion: The defined number range may have been exhausted, meaning that all available numbers within that range have been used. Authorization Issues: The user may not have the necessary authorizations to access or create number ranges.
Configuration Issues: There may be configuration issues in the EPM Data Generator settings or in the number range settings.
Solution: Check Number Range Configuration: Go to transaction code SNRO (Number Range Objects) and check if the number
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SEPM_DG015 EPM Data Generator: Database Snapshot deleted
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SEPM_DG014 EPM Data Generator: Database Snapshot imported
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SEPM_DG017 EPM Data Generator: Number Ranges reset
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SEPM_DG018 Error: Snapshot key not found
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.