ORA-26748
        The one-to-one transformation function string encountered the following error:  string
        
        
        Cause
        The specified transformation function encountered an error.
        Action
        Ensure that the function does not return an LCR that has a different type from the LCR which was passed to the function. Also ensure that the function does not return NULL. For DDL transformation functions, creating and returning a new DDL LCR is not allowed.
        
     
    
    
        ORA-26748
        The one-to-one transformation function string encountered the following error:  string
        
        
        Cause
        The specified transformation function encountered an error.
        Action
        Ensure that the function does not return an LCR that has a different type from the LCR which was passed to the function. Also ensure that the function does not return NULL. For DDL transformation functions, creating and returning a new DDL LCR is not allowed.
        
     
    
    
        ORA-26748
        The one-to-one transformation function string encountered the following error:  string
        
        
        Cause
        The specified transformation function encountered an error.
        Action
        Ensure that the function does not return an LCR that has a different type from the LCR which was passed to the function. Also ensure that the function does not return NULL. For DDL transformation functions, creating and returning a new DDL LCR is not allowed.