How To Fix EWA488 - Prorations are only possible in the last time slice

EWA488 - Overview

• Message type: E = Error

• Message class: EWA - IS-U-WA: Waste Management

• Message number: 488

• Message text: Prorations are only possible in the last time slice

What causes this issue?

You wanted to change the container quantity of a container group for a
key date. This is not possible, as later time slices already exist for
the container group.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can only change the container quantity in the most current time
slice.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

EWA488 - Details

• The SAP error message EWA488, which states "Prorations are only possible in the last time slice," typically occurs in the context of financial or controlling modules when dealing with time-based allocations or distributions of costs or revenues. This error indicates that the system is trying to perform a prorated calculation in a time slice that is not the last one, which is not allowed.
  
  Cause:
  
  Incorrect Time Slice Selection: The error usually arises when a user attempts to perform a prorated calculation in a time slice that is not the final one. In SAP, prorations are generally meant to be applied to the last period of a time slice to ensure that the calculations are accurate and reflect the total for that period.
  
  Configuration Issues: There may be configuration settings in the controlling or financial modules that restrict prorations to only the last time slice.
  Data Entry Errors: Users may inadvertently select the wrong