Message type: E = Error
Message class:  8I - Localization India 
Message number: 224
Message text: 'C' or 'D' are valid credit/debit indicators and not &
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The SAP error message 8I224 indicates that there is an issue with the credit or debit indicator in a financial transaction. Specifically, it states that only 'C' (credit) or 'D' (debit) are valid indicators, and the system has encountered an invalid value represented by '&'.
Cause: The error typically arises when: A transaction is being processed with an invalid credit/debit indicator. The system is expecting either 'C' or 'D', but it has received an unexpected character or value (in this case, '&'). There may be a data entry error or a programming issue in the custom code or configuration that is passing the incorrect value.
Solution: To resolve this error, you can take the following steps: Check Input Values: Review the transaction data being processed to ensure that the credit/debit indicator is correctly set to either 'C' or 'D'. Correct any entries that are not valid. Debugging: If you are working with custom programs or enhancements, check the code
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