How To Fix /SAPAPO/RBA055 - Invalid entry: Values less than zero are not allowed here

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/RBA -

• Message number: 055

• Message text: Invalid entry: Values less than zero are not allowed here

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RBA055 - Invalid entry: Values less than zero are not allowed here ?

  The SAP error message /SAPAPO/RBA055 Invalid entry: Values less than zero are not allowed here typically occurs in the context of SAP Advanced Planning and Optimization (APO) when a user attempts to enter a negative value in a field that only accepts non-negative values. This can happen in various scenarios, such as during planning, forecasting, or when entering data into specific transactions.
  Cause:
  
  Negative Values: The most common cause of this error is that the user is trying to input a negative number in a field that does not allow it. This could be in demand planning, supply planning, or any other area where quantities, costs, or other metrics are expected to be zero or positive.
  Data Entry Errors: Mistakes during data entry, such as accidentally typing a negative sign or misinterpreting the required input format.
  Configuration Issues: In some cases, the configuration of the planning area or the characteristics of the key figures may not allow negative values, leading to this error.
  
  Solution:
  
  Check Input Values: Review the values being entered to ensure that they are all non-negative. If a negative value is not intended, correct it to a valid positive number or zero.
  Review Data Sources: If the values are being pulled from another system or data source, check that the source data does not contain negative values where they are not allowed.
  Configuration Review: If you believe that negative values should be allowed in certain scenarios, review the configuration settings in the planning area or key figures to see if adjustments can be made.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on the fields you are working with to understand their constraints better.
  Error Handling: Implement error handling in your data entry processes to catch negative values before they trigger this error.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, there may be specific fixes or updates that address this issue.
  Transaction Codes: Familiarize yourself with relevant transaction codes in SAP APO that may be related to the data entry process you are working with (e.g., /SAPAPO/DP for demand planning).
  User Training: Ensure that users are trained on the correct data entry procedures and the implications of entering negative values in the system.
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP support team or a technical consultant who specializes in SAP APO for further assistance.