using fb2.0.3 on fedora (cutting the uninteresting bits out)

CREATE DATABASE 'localhost:/opt/unb/db/mydb.fdb'
PAGE_SIZE 8192
DEFAULT CHARACTER SET UTF8;

/* from ib_udf.sql */
DECLARE EXTERNAL FUNCTION strlen
CSTRING(32767)
RETURNS INTEGER BY VALUE
ENTRY_POINT 'IB_UDF_strlen' MODULE_NAME 'ib_udf';

At line 454 in file unbsl.ddl.sql
Statement failed, SQLCODE = -204
Dynamic SQL Error
-SQL error code = -204
-Data type unknown
-Implementation limit exceeded
-COLUMN DSQL internal