How To Fix MH320 - Error with an ASSIGN statement for &

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 320

• Message text: Error with an ASSIGN statement for &

What causes this issue?

Using an ASSIGN statement, the program has tried to refer to internal
table field &V1& dynamically. However, the necessary field or internal
table is not defined. This error should not occur in normal program
operation.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Notify your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MH320 - Error with an ASSIGN statement for & ?

  The SAP error message MH320 typically indicates an issue with an ASSIGN statement in ABAP (Advanced Business Application Programming). This error occurs when the system encounters a problem while trying to assign a field symbol to a data object. The error message usually includes a reference to the specific field symbol that is causing the issue.
  Cause of MH320 Error
  
  
  Invalid Field Symbol: The field symbol you are trying to assign may not be pointing to a valid data object. This can happen if the data object has not been defined or initialized properly.
  
  
  Data Type Mismatch: The data type of the field symbol may not match the data type of the target object. For example, trying to assign a field symbol to a structure when it is expected to be a simple data type.
  
  
  Scope Issues: The data object you are trying to assign to the field symbol may be out of scope or not accessible at the point of the ASSIGN statement.
  
  
  Null Pointer: If the field symbol is being assigned to a null reference or an uninitialized variable, it can lead to this error.
  
  
  Solution
  To resolve the MH320 error, you can follow these steps:
  
  
  Check Field Symbol Declaration: Ensure that the field symbol is declared correctly using the FIELD-SYMBOLS statement. For example:
  FIELD-SYMBOLS: <fs_variable> TYPE any.
  
  
  Validate Data Object: Make sure that the data object you are trying to assign to the field symbol is properly initialized and is of the correct type. For example:
  DATA: lv_variable TYPE string.
  ASSIGN lv_variable TO <fs_variable>.
  
  
  Use ASSIGNING Correctly: Ensure that you are using the ASSIGN statement correctly. If you are using it with a dynamic field, make sure that the field exists and is accessible.
  
  
  Check for Null References: Before the ASSIGN statement, check if the data object is not null or uninitialized. You can use the IF statement to check for validity.
  
  
  Debugging: Use the ABAP debugger to step through the code and inspect the values of the variables and field symbols at runtime. This can help identify where the issue is occurring.
  
  
  Error Handling: Implement error handling to manage cases where the ASSIGN statement fails. You can use the ASSIGN ... CASTING statement to handle type casting more safely.
  
  
  Related Information
  
  ABAP Documentation: Refer to the official SAP documentation for more details on field symbols and the ASSIGN statement.
  SAP Community: Engage with the SAP Community forums to find discussions and solutions related to similar issues.
  SAP Notes: Check SAP Notes for any known issues or patches related to the MH320 error.
  
  By following these steps and understanding the underlying causes, you should be able to resolve the MH320 error effectively.