When COBSQL has to interact with other COBOL Integrated Preprocessors (for example, CP or HTMLPP), it needs to make sure that the subordinate preprocessor(s) are using the same line buffer size as COBSQL. If they are not, this error message is generated.
Under normal execution, this message should not appear. If it does, it indicates that an old version of COBSQL is being used with a new Integrated Preprocessor, or vice versa.