How To Fix /SAPAPO/RBA155 - Subst. preselection not active in rule strategy &2/&3/&4 for item &1

/SAPAPO/RBA155 - Overview

• Message type: E = Error

• Message class: /SAPAPO/RBA -

• Message number: 155

• Message text: Subst. preselection not active in rule strategy &2/&3/&4 for item &1

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

/SAPAPO/RBA155 - Details

• The SAP error message /SAPAPO/RBA155 indicates that the substitution preselection is not active in the rule strategy for a specific item in the Advanced Planning and Optimization (APO) module. This error typically arises in the context of the SAP APO system when dealing with rules for substitution in planning scenarios.
  
  Cause:
  
  Inactive Substitution Preselection: The substitution preselection feature is not activated for the specific rule strategy being used for the item in question.
  
  Configuration Issues: There may be a misconfiguration in the rule strategy settings or the substitution rules themselves.
  Item-Specific Settings: The item for which the error is raised may not have the necessary settings or rules defined to allow for substitution.
  
  
  Solution:
  
  
  Activate Substitution Preselection:
  
  Go to the configuration settings for the rule strategy in the SAP APO system.
  Ensure that the substitution preselection is activated for the relevant strategy.
  This can typically be done in the transaction code /SAPAPO/RBA or through the relevant customizing path in