Please make sure you have read the Tag Syntax document and understand how tag attribute syntax works.
Description
Error formatting macro: snippet: java.lang.NullPointerException
To use method attribute (to use multiple submit buttons which direct to different action methods) you must set struts.enable.DynamicMethodInvocation to true but this can lead to security vulnerability - use with care! Instead you can try to use Multiple Submit Buttons solution.
This tag works with all themes, but has special importance when combined with the form tag in the ajax theme. Please read up on the ajax theme for more information.
Parameters
Error formatting macro: snippet: java.lang.NullPointerException