How To Fix FB151 - Session &: First doc. does not begin with a header record (type 1)

SAP Error Message - Details

• Message type: E = Error

• Message class: FB - Batch Programs

• Message number: 151

• Message text: Session &: First doc. does not begin with a header record (type 1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FB151 - Session &: First doc. does not begin with a header record (type 1) ?

  The SAP error message FB151 indicates that there is an issue with the format of the data being processed in a batch input session. Specifically, the error message "First doc. does not begin with a header record (type 1)" suggests that the first document in the session does not start with the expected header record, which is necessary for the batch input to function correctly.
  Cause:
  
  Incorrect File Format: The input file may not be formatted correctly. The first line of the file should contain a header record (type 1) that specifies the document type and other relevant information.
  Missing Header Record: The header record might be missing entirely, or there could be an issue with how the data is structured.
  Data Corruption: The data file may have been corrupted or improperly generated, leading to the absence of the required header record.
  Improper Configuration: The configuration settings for the batch input session may not align with the expected input format.
  
  Solution:
  
  Check Input File: Open the input file and verify that the first line contains a valid header record (type 1). Ensure that it follows the required format as specified in the SAP documentation.
  Correct Formatting: If the header record is missing or incorrectly formatted, correct it according to the specifications. The header record typically includes fields such as document type, company code, and other necessary identifiers.
  Re-generate Input File: If the input file is corrupted or improperly generated, consider re-generating it from the source system or application.
  Review Batch Input Session: Check the configuration of the batch input session to ensure it is set up correctly to process the input file.
  Test with Sample Data: Create a small sample input file with a valid header record and test it to ensure that the batch input session processes it without errors.
  
  Related Information:
  
  Batch Input Sessions: Batch input is a method in SAP for processing large volumes of data by simulating user input. Each session consists of a series of records, starting with a header record.
  SAP Documentation: Refer to the SAP Help Portal or relevant documentation for detailed specifications on the format of batch input files and header records.
  Transaction Codes: You can use transaction codes like SM35 to monitor and manage batch input sessions in SAP.
  
  If the issue persists after checking the above points, it may be helpful to consult with your SAP Basis or technical team for further investigation.