If you were logged in you would be able to see more operations.
create or alter procedure TEST1
for execute statement 'select 1+1 from rdb$database'
on external '________'
with common transaction
as user 'SYSDBA' password 'masterke'
into :v_int do
with target database of interbase 4.1 results in
"Unsuccessful execution caused by system error that does not preclude successful execution of subsequent statements.
Unexpected error in isc_database_info.
At procedure 'TEST1' line: 6, col: 3." message.