The first argument to dbinfo() should be a quoted string constant. If the first argument to dbinfo() is the string 'version', then the second argument should also be a quoted string constant.
-726 First argument to dbinfo() must be a quoted string constant.
Check that the first argument to dbinfo() is a quoted string that corresponds to one of the following values: 'dbspace', 'sqlca.sqlerrd1', or 'sqlca.sqlerrd2'.