How To Fix OO_SOURCE_BASED031 - The class definition cannot uniquely be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: OO_SOURCE_BASED - WB - Class Builder - Messages for the source-b. Class Editor

• Message number: 031

• Message text: The class definition cannot uniquely be determined

What causes this issue?

The class can't be separated into its different source parts (public-,
protected-, (package-,) private section or method implementation).

System Response

A warning will be sent and the changes won't be stored.

How to fix this error?

Please check whether the source contains the following statements:
<EX>CLASS <class_name> DEFINITION.</>
<EX>...</>
<EX>ENDCLASS.</>

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<EX>CLASS <class_name> IMPLEMENTATION.</>
<EX> METHOD <method_name_1>.</>
<EX> ...</>
<EX> ENDMETHOD.</>
<EX> ...</>
<EX> METHOD <method_name_n>.</>
<EX> ...</>
<EX> ENDMETHOD.</>
<EX>ENDCLASS.</>
<EX>It is also important to check that the public-, protected-,
(package-) and private section are in the correct order.</>
<EX>The syntax check will help you to determine where the class
structure is insufficient.</>

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO_SOURCE_BASED031 - The class definition cannot uniquely be determined ?

  The SAP error message OO_SOURCE_BASED031 ("The class definition cannot uniquely be determined") typically occurs in the context of ABAP programming when the system is unable to resolve a class definition due to ambiguity. This can happen for several reasons, such as:
  Causes:
  
  Ambiguous Class Names: There may be multiple classes with the same name in different namespaces or packages, leading to confusion about which class to use.
  Missing or Incomplete Class Definition: The class might not be fully defined or might be missing in the system.
  Incorrect Use of Interfaces or Inheritance: If a class is trying to implement an interface or inherit from a class that is not clearly defined, it can lead to this error.
  Transport Issues: If the class definition was transported from another system and not all dependencies were transported, it could lead to this error.
  Changes in Class Structure: If the class structure has changed (e.g., renaming or moving classes) and