MySQL WorkBench 6.2.3 error with uppercase keywords (no replies)

With MySQL WorkBench 6.1.7 I used without problems sql script with uppercase keywords (i.e. DROP TABLE IF EXISTS schemaname.tablename). With MySQL WorkBench 6.2.3 I get error:
- DROP TABLE IF EXISTS schemaname.tablename -> ERROR
- drop table if exists schemaname.tablename -> OK
Can you help me to understand what is the problem?
thank you