Web-item condition based on issue type

[Vishwanath_Pal]

I have a plugin web-item button on top of the nav bar and that should be only displayed if the displayed Issue is of issuetype "Estimation" or "Bug". i have tryed  the code has already given in (https://community.atlassian.com/t5/Answers-Developer-Questions/Web-item-condition-getIssue/qaq-p/492891?posted=604618#U604618) but it is not working at all. i getting null pointer exception here. so plz any suggestion or link would  be great help.

[Daniel Wester]

You may want to ask your question over at the developer community: community.developer.atlassian.com

if you can post your code and stack trace there as well it will help you get an answer faster