How To Fix RS_ADSO_MODEL155 - '&1': Only alpha-numeric characters and '_' are allowed in field names

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_ADSO_MODEL - Messages related to the Datastore Object Backend

• Message number: 155

• Message text: '&1': Only alpha-numeric characters and '_' are allowed in field names

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 RS_ADSO_MODEL155 - '&1': Only alpha-numeric characters and '_' are allowed in field names ?

  The SAP error message RS_ADSOMODEL155 '&1': "Only alpha-numeric characters and '' are allowed in field names" typically occurs when you are trying to create or modify an Advanced DataStore Object (ADSO) in SAP BW/4HANA or SAP BW on HANA, and the field names you are using do not comply with the naming conventions required by the system.
  Cause:
  The error is triggered when:
  
  You attempt to use special characters, spaces, or symbols in the field names of your ADSO.
  The field names may contain characters that are not allowed, such as punctuation marks, special symbols, or even leading numbers.
  
  Solution:
  To resolve this error, you should:
  
  
  Review Field Names: Check the field names you are trying to use in your ADSO definition. Ensure that they only contain:
  
  Uppercase and lowercase letters (A-Z, a-z)
  Numbers (0-9)
  Underscore (_) character
  
  
  
  Rename Fields: If any field names contain invalid characters, rename them to conform to the allowed character set. For example:
  
  Change Sales Amount$ to Sales_Amount
  Change Customer Name to Customer_Name
  
  
  
  Consistency: Ensure that all field names across your data model are consistent and follow the same naming conventions.
  
  
  Recreate or Modify: If you have already created the ADSO and are facing this error while trying to modify it, you may need to delete the problematic fields and recreate them with valid names.
  
  
  Documentation: Refer to the SAP documentation for naming conventions specific to your version of SAP BW/4HANA or SAP BW on HANA for further guidance.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or updates regarding this error.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Best Practices: Follow best practices for naming conventions in SAP BW/4HANA to avoid such errors in the future.
  
  By ensuring that all field names adhere to the specified naming conventions, you should be able to resolve the RS_ADSO_MODEL155 error and successfully create or modify your ADSO.