How To Fix GD026 - The start index must be at least 1.

SAP Error Message - Details

• Message type: E = Error

• Message class: GD - EDT: External data transfer

• Message number: 026

• Message text: The start index must be at least 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GD026 - The start index must be at least 1. ?

  The SAP error message GD026, which states "The start index must be at least 1," typically occurs in the context of data processing or when working with certain functions that require a valid index. This error indicates that an operation is attempting to access an index that is either zero or negative, which is not permissible in SAP.
  Cause:
  
  Invalid Indexing: The most common cause of this error is that the code or function is trying to access an array or a list using an index that is less than 1. In many programming languages, including ABAP (the programming language used in SAP), array indexing starts at 1.
  Data Input Issues: If the input data for a function or operation is not properly validated, it may lead to an attempt to access an invalid index.
  Looping Errors: Errors in loops that manipulate indices can also lead to this issue, especially if the loop counter is not initialized correctly.
  
  Solution:
  
  Check Index Values: Review the code or function where the error occurs and ensure that all index values are initialized and incremented correctly. Make sure that any index used to access arrays or lists starts from 1.
  Input Validation: Implement input validation to ensure that any data being processed does not lead to invalid index values. This can include checks before accessing arrays or lists.
  Debugging: Use debugging tools in SAP to trace the execution of the program and identify where the invalid index is being generated. Look for any loops or calculations that might lead to an incorrect index.
  Review Documentation: If you are using standard SAP functions or methods, refer to the SAP documentation to understand the expected input parameters and constraints.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are documented in SAP Notes.
  Community Forums: SAP Community and other forums can be helpful to see if other users have encountered the same issue and what solutions they found.
  ABAP Programming Guidelines: Familiarize yourself with ABAP programming best practices, especially regarding array handling and index management.
  
  By following these steps, you should be able to identify the cause of the GD026 error and implement a solution to resolve it.