How To Fix /CCIS/TAX636 - Bad expression: expression '&' in formula '&' of item '&'

/CCIS/TAX636 - Overview

• Message type: E = Error

• Message class: /CCIS/TAX -

• Message number: 636

• Message text: Bad expression: expression '&' in formula '&' of item '&'

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.

Unfortunately, there isn't any extra information in this error notice.

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/CCIS/TAX636 - Details

• The SAP error message /CCIS/TAX636 Bad expression: expression '&' in formula '&' of item '&' typically indicates that there is an issue with a tax calculation formula in the SAP system, particularly in the context of the SAP Convergent Charging (SAP CC) or SAP Convergent Invoicing (SAP CI) modules. This error suggests that there is a problem with the syntax or structure of a formula used to calculate taxes.
  
  Cause:
  
  Syntax Error: The formula may contain invalid syntax or characters that are not recognized by the system.
  Missing Variables: The formula might reference variables or fields that are not defined or are missing.
  Incorrect Data Types: The formula may be trying to perform operations on incompatible data types (e.g., trying to perform arithmetic on a string).
  Logical Errors: There may be logical errors in the formula that prevent it from being evaluated correctly.
  
  
  Solution:
  
  Review the Formula: Check the formula referenced in the error message for any