How To Fix WRF_APC231 - Unable to read dates from previous scheduling, invalid dateline

WRF_APC231 - Overview

• Message type: E = Error

• Message class: WRF_APC - Messages for Operational Assortment Planning and Control

• Message number: 231

• Message text: Unable to read dates from previous scheduling, invalid dateline

What causes this issue?

The reference passed is invalid. No corresponding entry could be found
in the database or the buffer.

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?

If the item can be changed, choose the <LS>Item Data</> tab page in the
detail view. There you can delete the reference to allow for new
scheduling.

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 WRF_APC231 - Unable to read dates from previous scheduling, invalid dateline ?

  SAP Error Message:
  WRF_APC231 - Unable to read dates from previous scheduling, invalid dateline
  
  
  Cause:
  This error typically occurs in the Advanced Planning and Scheduling (APC) or Production Planning (PP) environment when the system tries to read scheduling dates from a previous scheduling run but encounters invalid or inconsistent date values (referred to as "dateline"). The "dateline" here means the date fields related to scheduling (like start date, finish date, or other key date fields) contain values that are either missing, corrupted, or logically inconsistent (e.g., finish date earlier than start date).
  Common causes include:
  
  Corrupted or incomplete scheduling data in the database.
  Inconsistent or missing date entries in the production order or planned order.
  Data inconsistencies due to interrupted or failed previous scheduling runs.
  Custom enhancements or user exits that incorrectly manipulate scheduling dates.
  System time zone or calendar settings causing date misinterpretation.
  
  
  
  Solution:
  To resolve the error, consider the following steps:
  
  
  Check the Scheduling Data:
  
  Review the production or planned order