How To Fix AD637 - Field &1 contains '-'; change this now

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 637

• Message text: Field &1 contains '-'; change this now

What causes this issue?

According to the naming convention, the character '-' is not allowed in
an object name, but existing fields that contain this character are
accepted.
With the introduction of type definitions in the ABAP Dictionary, the
use of '-' in field names can result in inconsistencies. Example:
X and Y are structures:
X Field Type Y Field Type
B Y C DTEL3
B-C DTEL1 E DTEL4
D DTEL2
X-B-C is not unique. It could be either field B-C of structure X or
component C of structure B in X.
Structures with '-' in field names can only be addressed with LIKE in
ABAP programs, but not with TYPE. However, structures in which fields
contain structures as type cannot only be used with TYPE.

How to fix this error?

Change the field names. The valid characters within a name are letters,
digits and underlining. Digits may not be in the first position.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD637 - Field &1 contains '-'; change this now ?

  The SAP error message AD637 indicates that a specific field (denoted as &1) contains a negative value (represented by the '-' sign), which is not acceptable in the context of the operation you are trying to perform. This error typically arises in scenarios where only positive values are allowed, such as in certain financial transactions, inventory management, or data entry processes.
  Cause:
  
  Negative Value Entry: The field in question has been populated with a negative value, which is not permitted.
  Data Migration Issues: If data has been migrated from another system, negative values may have been inadvertently included.
  Incorrect Calculation: A calculation or formula may have resulted in a negative value due to incorrect parameters or logic.
  User Input Error: A user may have mistakenly entered a negative value when they intended to enter a positive one.
  
  Solution:
  
  Change the Value: Navigate to the field indicated by the error message and change the negative value to a positive one. Ensure that the value is appropriate for the context of the transaction.
  Review Data Entry: If the error is due to user input, review the data entry process to ensure that users are aware of the restrictions on negative values.
  Check Calculations: If the negative value is the result of a calculation, review the logic and parameters used in the calculation to ensure they are correct.
  Data Validation: Implement validation checks in the system to prevent negative values from being entered in the future.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines related to the field in question.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be working in various transaction codes (e.g., MIRO for invoice verification, MIGO for goods movement, etc.).
  Field Context: Understanding the specific field and its purpose can help in determining why negative values are not allowed.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  User Training: Providing training for users on data entry standards can help reduce the occurrence of this error.
  
  If you continue to encounter issues after addressing the negative value, it may be beneficial to consult with your SAP support team or a technical consultant for further assistance.