How To Fix SO2_TAGLIB021 - Names cannot begin with a number

SAP Error Message - Details

• Message type: E = Error

• Message class: SO2_TAGLIB - Editor for BSP Extensions

• Message number: 021

• Message text: Names cannot begin with a number

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 SO2_TAGLIB021 - Names cannot begin with a number ?

  The SAP error message SO2_TAGLIB021, which states "Names cannot begin with a number," typically occurs in the context of SAP Web Dynpro or when working with UI elements in SAP applications. This error indicates that a name or identifier you are trying to use starts with a numeric character, which is not allowed according to naming conventions in SAP.
  Cause:
  
  Invalid Naming Convention: In SAP, identifiers such as variable names, component names, or UI element names must adhere to specific naming rules. One of these rules is that names cannot start with a number.
  User Input: If the name is derived from user input or external data, it may inadvertently start with a number.
  Code Generation: If you are using a code generation tool or framework, it might generate names that do not comply with SAP's naming conventions.
  
  Solution:
  
  Rename the Identifier: Change the name of the variable, component, or UI element so that it does not start with a number. For example, if the name is 1stElement, rename it to firstElement or element1.
  Check User Input: If the name is based on user input, implement validation to ensure that the input does not start with a number before it is processed.
  Review Code Generation Logic: If you are using a code generation tool, review its configuration or templates to ensure that it generates valid names according to SAP's naming conventions.
  Testing: After making the changes, test the application to ensure that the error is resolved and that the application behaves as expected.
  
  Related Information:
  
  SAP Naming Conventions: Familiarize yourself with SAP's naming conventions for variables, components, and other identifiers. Generally, names should start with a letter and can include letters, numbers, and underscores.
  Documentation: Refer to the official SAP documentation for guidelines on naming conventions and best practices in Web Dynpro and other SAP technologies.
  Debugging: Use debugging tools in the SAP environment to trace where the invalid name is being generated or used, which can help in identifying the root cause of the issue.
  
  By following these steps, you should be able to resolve the SO2_TAGLIB021 error and ensure that your identifiers comply with SAP's naming rules.