Message type: E = Error
Message class:  E_ACTION - E-Actions 
Message number: 162
Message text: 'Letter Type' should not be empty.
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The SAP error message E_ACTION162 indicates that a required field, specifically the "Letter Type," is empty when it should contain a value. This error typically occurs in scenarios where a letter or document generation process is being initiated, and the system expects a specific type of letter to be defined.
Cause: Missing Configuration: The letter type may not be configured in the system. User Input Error: The user may have forgotten to select or input a letter type in the relevant transaction or screen. Data Transfer Issues: If data is being transferred from another system or module, the letter type may not have been included in the data set. Custom Development: If there are custom programs or enhancements, they may not be handling the letter type correctly.
Solution: Check Configuration: Navigate to the relevant configuration settings in SAP (usually found in the SPRO transaction). Ensure that the letter types are defined and active in the system. Input Validation: When initiating the
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