ORA-19941
        invalid blocksize in cross-platform datafile string
        
        
        Cause
        Blocksize in header of datafile copy being converted at target was invalid.  Either datafile has not been made read/write with compatibility 10.0 or greater at source database or datafile copy is corrupted.
        Action
        Make a new datafile copy taken after tablespace has been made read/write with compatibility 10.0 at source database and retry conversion.
        
     
    
    
        ORA-19941
        invalid blocksize in cross-platform datafile string
        
        
        Cause
        Blocksize in header of datafile copy being converted at target was invalid.  Either datafile has not been made read/write with compatibility 10.0 or greater at source database or datafile copy is corrupted.
        Action
        Make a new datafile copy taken after tablespace has been made read/write with compatibility 10.0 at source database and retry conversion.
        
     
    
    
        ORA-19941
        invalid blocksize in cross-platform datafile string
        
        
        Cause
        Blocksize in header of datafile copy being converted at target was invalid.  Either datafile has not been made read/write with compatibility 10.0 or greater at source database or datafile copy is corrupted.
        Action
        Make a new datafile copy taken after tablespace has been made read/write with compatibility 10.0 at source database and retry conversion.