On page http://jakarta.apache.org/jmeter/usermanual/functions.html "Built-in functions are written in the same manner, but by convention, the names of built-in parameters begin with "__" to avoid conflict with user value names" Should read "Built-in functions are written in the same manner, but by convention, the names of built-in functions begin with "__" to avoid conflict with user value names"
Thanks, Applied to SVN
This issue has been migrated to GitHub: https://github.com/apache/jmeter/issues/1753