I just follow an example in API guide to test error code,

supply an invalid password in pdb argument to isc_attach_database, then
immediately test for error,

"isc_interprete" works but what should be minimum size of msg buffer to avoid
overflow?

isc_interprete (msg , &pstatusvec)

for example:
Your user name and password are not defined. Ask your database administrator to
set up a Firebird login.

But "isc_sql_interprete" does not work,
sqlcode=isc_sqlcode (statusvec)
isc_sql_interprete (sqlcode , msg, 512)

it always return:
Unsuccessful execution caused by a system error that precludes
successful execution of subsequent statements













how to use isc_sql_interprete?

regards,