How To Fix E1305 - To activate the conversion, you must first maintain the conversion table

E1305 - Overview

• Message type: E = Error

• Message class: E1 - Messages for IDoc Basis

• Message number: 305

• Message text: To activate the conversion, you must first maintain the conversion table

Self-Explanatory Message

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E1305 - Details

• The SAP error message E1305, "To activate the conversion, you must first maintain the conversion table," typically occurs when there is an attempt to activate a conversion routine or a conversion function without having the necessary conversion table properly defined or maintained in the system.
  
  Cause:
  
  Missing Conversion Table: The conversion table that is required for the specific conversion routine is not maintained or does not exist.
  Incomplete Configuration: The configuration for the conversion routine may be incomplete, leading to the inability to activate it.
  Authorization Issues: The user may not have the necessary authorizations to maintain or view the conversion table.
  
  
  Solution:
  
  
  Maintain the Conversion Table:
  
  Go to the relevant transaction code (usually SE11 for Data Dictionary or SE78 for SAPscript forms) to maintain the conversion table.
  Ensure that the conversion table is properly defined with all necessary entries.
  
  
  
  Check Configuration:
  
  Review the configuration settings related to the conversion routine. Ensure that all required parameters and settings are correctly