How To Fix /SAPAPO/DMRES018 - Enter validity start date

/SAPAPO/DMRES018 - Overview

• Message type: E = Error

• Message class: /SAPAPO/DMRES -

• Message number: 018

• Message text: Enter validity start date

Self-Explanatory Message

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.

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/SAPAPO/DMRES018 - Details

• The SAP error message /SAPAPO/DMRES018 indicates that a validity start date is required for a specific operation or transaction in the SAP Advanced Planning and Optimization (APO) module. This error typically occurs when you are trying to create or modify a resource, planning object, or similar entity that requires a validity period, but the start date has not been provided.
  
  Cause:
  
  Missing Validity Start Date: The most common cause is that the user has not entered a validity start date in the relevant field.
  Incorrect Configuration: There may be configuration settings in the APO system that require a validity date but are not properly set up.
  Data Entry Error: The user may have overlooked the field or entered an invalid date format.
  
  
  Solution:
  
  
  Enter Validity Start Date: 
  
  Navigate to the transaction or screen where the error occurred.
  Locate the field for the validity start date and enter a valid date.
  Ensure that the date format is correct (e.g.,