How To Fix AH843 - Internal: Change to time category not allowed

AH843 - Overview

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 843

• Message text: Internal: Change to time category not allowed

What causes this issue?

The time category for the steps with the specified partial key has
changed in internal table IOPER.
<DS:DE.CSNO>Schema step during billing</> &V1&
Number of operand &V2&
Operand &V3&
This causes an error during price block adjustment in function module
ISU_PRICE_ZONES_ADJUST.

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?

INCLUDE ISU_SAP OBJECT DOKU ID TX
Specify the partial key in your message.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH843 - Internal: Change to time category not allowed ?

  The SAP error message AH843 ("Internal: Change to time category not allowed") typically occurs in the context of time management or time recording in SAP systems, particularly when dealing with time evaluation or time-related infotypes. This error indicates that there is an attempt to change the time category of a time entry that is not permitted due to the system's internal logic or configuration.
  Causes:
  
  Incorrect Time Category Change: The user may be trying to change a time entry's category (e.g., from "working time" to "absence") in a way that is not allowed by the system.
  
  Configuration Issues: The configuration settings in the SAP system may not allow for certain changes to be made to time categories.
  Data Consistency: The system may have detected that changing the time category would lead to inconsistencies in the time data or violate business rules.
  Locked Entries: The time entry may be locked for editing due to ongoing processes,