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Message type: E = Error
Message class: WL - Workflow: run-time messages
Message number: 108
Message text: Expression & has object type & and not & (=reference object type)
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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WL108
- Expression & has object type & and not & (=reference object type) ?The SAP error message WL108 indicates that there is a type mismatch in your ABAP code, specifically related to object types. This error typically occurs when you are trying to use an expression that has an object type that does not match the expected reference object type.
Cause:
The error message WL108 is triggered when:
To resolve this error, you can take the following steps:
Check Object Types: Review the types of the objects involved in the expression. Ensure that they are compatible. You can do this by checking the data dictionary or the definitions of the classes/interfaces involved.
Type Casting: If you are certain that the objects can be treated as the same type, you may need to perform a type cast. Use the CAST
statement to convert one object type to another, ensuring that the conversion is valid.
DATA: lo_object TYPE REF TO your_class,
lo_other_object TYPE REF TO another_class.
lo_object = CAST your_class( lo_other_object ).
Use Interfaces: If the objects implement a common interface, consider using the interface type for your variable declarations. This can help avoid type mismatches.
Debugging: Use the debugger to inspect the values and types of the objects at runtime. This can help you identify where the type mismatch is occurring.
Review Method Signatures: If the error occurs in a method call, check the method signature to ensure that the parameters being passed match the expected types.
By following these steps, you should be able to identify and resolve the cause of the WL108 error in your SAP ABAP code.
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