How To Fix CRD_RUN302 - Error in narrowing cast: Source has wrong typing

SAP Error Message - Details

• Message type: E = Error

• Message class: CRD_RUN - General Messages for CRD Runtime

• Message number: 302

• Message text: Error in narrowing cast: Source has wrong typing

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CRD_RUN302 - Error in narrowing cast: Source has wrong typing ?

  The SAP error message CRD_RUN302: Error in narrowing cast: Source has wrong typing typically occurs in the context of SAP BusinessObjects or SAP Crystal Reports when there is an issue with data type conversion or casting in a report or query. This error indicates that the system is trying to convert a data type to a more specific type, but the source data does not match the expected type.
  Causes:
  
  Data Type Mismatch: The most common cause is that the data type of the source field does not match the expected data type for the target field. For example, trying to cast a string to a number or a date to a string without proper formatting.
  Incorrect Formula: If you are using a formula in your report that involves casting or converting data types, and the formula is not correctly defined, it can lead to this error.
  Database Schema Changes: If there have been changes in the underlying database schema (like changing a column type), it may lead to this error if the report is not updated accordingly.
  Null Values: Attempting to cast a null value to a specific type can also trigger this error.
  
  Solutions:
  
  Check Data Types: Review the data types of the fields involved in the cast. Ensure that the source field's data type is compatible with the target field's data type.
  Modify Formulas: If you are using a formula that involves casting, check the logic and ensure that it correctly handles the data types. You may need to use functions like ToText(), ToNumber(), or ToDate() appropriately.
  Handle Null Values: Implement checks for null values before performing any casting. You can use functions like IsNull() to avoid casting nulls.
  Update Report: If there have been changes in the database schema, update your report to reflect these changes. This may involve refreshing the data source or modifying the fields used in the report.
  Test with Sample Data: If possible, test the report with sample data to identify where the casting issue occurs.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for BusinessObjects or Crystal Reports for detailed information on data types and casting.
  Community Forums: Check SAP community forums or other online resources where similar issues may have been discussed.
  Debugging Tools: Use debugging tools available in SAP BusinessObjects or Crystal Reports to trace the source of the error.
  
  By following these steps, you should be able to identify and resolve the CRD_RUN302 error in your SAP reports.