Howdy Anonymous Monk!

Could you tell us what error message you're getting exactly? Also, the code you posted runs without errors. Could you please post code that shows the problem you're trying to get help with, as well as any data that might be necessary to reproduce it?

Here's some nodes with helpful information for posting questions:

• How do I post a question effectively?
• Writeup Formatting Tips
• Markup in the Monastery

You'll make it much easier for us to help you that way.