Informix Error -50034: The specified base class or derived class name is NULL.
Cause and resolution
The specified base class or derived class name is NULL.
This message is generated by ixObject::isClassDerivedFromClass() if either parameter is NULL. In this case, the function returns a value of NULL. Check that both the subclass and base class names refer to existing, defined classes.
Oninit® Troubleshooting Guidance
Reasons / Common Causes
-50034 fires in the GUI builder ("Window Painter") class library -- per the official guidance: This message is generated by ixObject::isClassDerivedFromClass() if either parameter is NULL. In this case, the function returns a value of NULL. Check that both the subclass and base class names refer to existing, defined classes.
- The specified base class or derived class name is NULL -- an invalid argument, state, or
NULL value reaching
ixObject::isClassDerivedFromClass(), per the official guidance.
Solutions / Resolution
- Review the application's call to
ixObject::isClassDerivedFromClass()against the condition described above, and correct the argument, object state, or configuration involved, per the official guidance.
Examples
N/A
No specific triggering statement is documented beyond the GUI builder class library condition named in the official text.
Diagnostic Checks
- Check the application's use of
ixObject::isClassDerivedFromClass(), against the specific condition the official text describes.
Related Errors / Related Topics
No closely related error codes are cross-referenced for -50034 in this set yet.
The specified base class or derived class name is NULL.