Message type: E = Error
Message class:  O8 - IS-Oil: TD Transportation and Distribution 
Message number: 816
Message text: No internal numbers are left for creating rack meters
The end of the internal number range for rack meters has been reached.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Extend the internal number range 01 for rack meters before attempting
to create any additional rack meters.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message O8816, "No internal numbers are left for creating rack meters," typically occurs in the context of managing storage locations and inventory in SAP Warehouse Management (WM) or Extended Warehouse Management (EWM). This error indicates that the system has exhausted the available internal number range for creating new rack meters.
Cause: The primary cause of this error is that the internal number range defined for rack meters has been fully utilized. This can happen if: The number range has not been properly configured to allow for sufficient numbers. The existing numbers have been used up due to a high volume of rack meter creation. The number range has been set to a limited range and has not been extended.
Solution: To resolve this issue, you can take the following steps: Check Number Range Configuration: Go to the transaction code SNRO (Number Range Objects). Look for the number range object related to rack meters (you may need to
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
O8815 Assigned number & is the last available number
What causes this issue?  In using the last assigned number, you have reached the end of the internal number range. The system issues an error message ...
O8814 Very few numbers left
What causes this issue?  There are only a few free numbers left for internal number assignment.System Response  The system issues an error message and...
O8817 No changes made to the rack meter &, it is not possible to save here
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
O8818 Rack meter & has been created
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.