Logging off MS Chapp error messages

Hi All, I am just trying to figure out if its possible to log the following MS-Chap error messages via linelog mschap: ERROR: Program returned code (1) and output 'Logon failure (0xc000006d)' (8) mschap: External script failed (8) mschap: ERROR: External script says: Logon failure (0xc000006d) (8) mschap: ERROR: MS-CHAP2-Response is incorrect By using %{reply:MS-CHAP-Error}, I get something like this E=691 R=1 C=3c30753bced696c552fc3c78aeb953b0 V=3 M=Authentication failed But that is not as descriptive of the issue as above. Any suggestions would be great. Many Thanks Arnab