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How To Fix SWF_EXP_001504 - Operator '&1': invalid data type for expression '&2'


SAP Error Message - Details

  • Message type: E = Error

  • Message class: SWF_EXP_001 - Expression Service Messages

  • Message number: 504

  • Message text: Operator '&1': invalid data type for expression '&2'

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  • 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.



    What else can you do?

    First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

    Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

    You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.


Smart SAP Assistant

  • What is the cause and solution for SAP error message SWF_EXP_001504 - Operator '&1': invalid data type for expression '&2' ?

    The SAP error message SWF_EXP_001504 indicates that there is an issue with the data type of an operator in an expression within a workflow. Specifically, the message states that the operator &1 is being used with an invalid data type for the expression &2. This typically occurs in the context of workflow definitions or expressions where the expected data type does not match the actual data type being used.

    Cause:

    1. Data Type Mismatch: The most common cause of this error is that the operator being used expects a certain data type (e.g., integer, string, boolean), but the actual data type of the operand does not match this expectation.
    2. Incorrect Workflow Configuration: The workflow might be incorrectly configured, leading to the use of incompatible data types in expressions.
    3. Changes in Data Structure: If there have been changes in the underlying data structure or data types (e.g., changes in the database or data model), this can lead to mismatches in the workflow expressions.

    Solution:

    1. Check Data Types: Review the data types of the operands being used in the expression. Ensure that they match the expected data types for the operator. You can do this by checking the workflow definition and the data dictionary.
    2. Modify the Expression: If you find that the data types do not match, modify the expression to use compatible data types. This may involve casting or converting data types as necessary.
    3. Review Workflow Logic: Go through the workflow logic to ensure that all expressions are correctly defined and that the operators are being used appropriately.
    4. Testing: After making changes, test the workflow to ensure that the error is resolved and that the workflow behaves as expected.
    5. Consult Documentation: Refer to SAP documentation for the specific operators and their expected data types to ensure compliance.

    Related Information:

    • SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on handling data type issues in workflows.
    • Workflow Logs: Review workflow logs for additional context or details surrounding the error, which may help in diagnosing the issue.
    • SAP Community: Engage with the SAP Community forums or support channels for insights from other users who may have encountered similar issues.

    By following these steps, you should be able to identify and resolve the cause of the SWF_EXP_001504 error in your SAP workflow.

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