How To Fix CL066 - Class types & and & have different object tables

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 066

• Message text: Class types & and & have different object tables

What causes this issue?

Class types &V1& and &V2& are defined for different object types.
In a class type that has been defined for materials only, for example,
you cannot classify documents.

System Response

The system checks whether both the class types you are using are defined
for the same object type.

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?

For both classes, choose class types that are defined for the same
object type (for example, material).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL066 - Class types & and & have different object tables ?

  The SAP error message CL066 indicates that there is a mismatch between the object tables of two class types in the ABAP Object-Oriented programming environment. This typically occurs when you are trying to use or reference two classes that are not compatible due to their underlying object tables being different.
  Cause:
  
  Incompatible Class Types: The error usually arises when you are trying to inherit from a class or use a class that is not compatible with the current class due to differences in their object tables.
  Incorrect Class Definition: If a class is defined incorrectly or if there are changes in the class hierarchy that have not been properly managed, this error can occur.
  Changes in Class Structure: If the structure of a class has been changed (e.g., adding or removing attributes) and the dependent classes have not been updated accordingly, it can lead to this error.
  
  Solution:
  
  Check Class Definitions: Review the definitions of the classes involved in the error. Ensure that they are correctly defined and that their object tables are compatible.
  Recompile Classes: Sometimes, recompiling the classes can resolve inconsistencies. Use transaction SE80 or SE24 to recompile the classes.
  Check Inheritance: If you are using inheritance, ensure that the parent class is correctly defined and that the child class is inheriting from the correct parent class.
  Adjust Class Hierarchy: If there have been changes in the class hierarchy, ensure that all dependent classes are updated to reflect these changes.
  Use Transaction SE11: You can use transaction SE11 to check the data dictionary and see if there are any inconsistencies in the object tables of the classes.
  Debugging: If the error persists, consider debugging the program to identify the exact point of failure and the classes involved.
  
  Related Information:
  
  Class Types: In SAP ABAP, classes can be defined as local or global, and they can have different visibility (public, protected, private).
  Object Tables: Each class in ABAP has an associated object table that defines its structure and attributes. Mismatches in these tables can lead to errors.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with a more experienced ABAP developer or SAP support for further assistance.