More likely, its a variable name collision. Could you post the whole script?
- [jira] [Created] (PIG-2575) underline symbol... Shepherd Chu (Created) (JIRA)
- Re: [jira] [Created] (PIG-2575) underli... Dmitriy Ryaboy
- Re: [jira] [Created] (PIG-2575) und... Jonathan Coveney