How To Fix W_1001 - Message type & does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: W_1 - Message Class for WPOSA

• Message number: 001

• Message text: Message type & does not exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W_1001 - Message type & does not exist ?

  SAP Error Message:
  
  W_1001 Message type & does not exist
  
  Cause:
  This warning message occurs when the system tries to use a message type (e.g., 'E' for error, 'W' for warning, 'I' for information) that is not defined or recognized in the current context. The placeholder & in the message is replaced by the actual message type code that the system cannot find.
  Common scenarios include:  
  
  A program or function module attempts to issue a message with a message type that is not valid or not defined in the message class.  
  A custom or standard message is called with an incorrect or unsupported message type.  
  The message type parameter is dynamically determined and ends up being an invalid value.
  
  
  Explanation of Message Type in SAP:
  SAP messages have types that define their behavior:  
  
  S (Success)  
  I (Information)  
  W (Warning)  
  E (Error)  
  A (Abort)  
  X (Exit)  
  
  If a message type outside these or a custom undefined type is used, the system raises this warning.
  
  Solution:
  
  
  Check the message call in the code:  
  
  Look for the statement where the message is issued, e.g., MESSAGE ID ... TYPE ... NUMBER ....  
  Verify that the message type used is one of the valid SAP message types (S, I, W, E, A, X).
  
  
  
  Correct the message type:  
  
  If the message type is dynamically assigned, ensure the variable holds a valid message type before the message call.  
  Replace invalid or misspelled message types with valid ones.
  
  
  
  Check the message class and message number:  
  
  Ensure the message class and message number exist and are correctly referenced.
  
  
  
  Debugging:  
  
  Use the debugger to check the value of the message type variable at runtime.  
  Trace back to where the message type is set.
  
  
  
  If custom message types are used:  
  
  SAP does not support custom message types beyond the standard ones.  
  Adjust the program logic to use standard message types.
  
  
  
  
  Related Information:
  
  SAP Note: There might not be a specific SAP Note for this generic warning, but checking OSS Notes related to message handling can help.  
  Transaction SE91: Use this transaction to check message classes and messages.  
  ABAP Documentation: Refer to ABAP documentation on the MESSAGE statement for valid message types and usage.  
  Common ABAP message types:  
  
  S - Success message (green)  
  I - Information message (blue)  
  W - Warning message (yellow)  
  E - Error message (red, stops processing in dialog)  
  A - Abort message (terminates program)  
  X - Exit message (terminates program and returns to the caller)
  
  
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Invalid or undefined message type used in a MESSAGE statement.
  
  
  Solution
  Correct the message type to a valid SAP message type (S, I, W, E, A, X).
  
  
  Check
  Message call syntax, message class, message number, and variable holding message type.
  
  
  Tools
  SE91 (Message maintenance), ABAP debugger, ABAP documentation on MESSAGE statement.
  
  
  
  
  If you provide the exact code snippet or context where the message occurs, I can help pinpoint the exact fix.