Getting NullPointerException when the template contains fields that doesn't have the current issue project in its Available Context

Hi,

We have JIRA V6.2.2 and Xporter V3.2.4.
With the custom template (File attached) we get following error when exporting to Pdf or Word:

General Exception: java.lang.NullPointerException
java.lang.NullPointerException
at com.xpandit.jiraxporter.a.e.a(Unknown Source)
at com.xpandit.jiraxporter.a.e.a(Unknown Source)
at com.xpandit.jiraxporter.a.f.a(Unknown Source)
at com.xpandit.jiraxporter.component.service.XporterServiceImpl.exportIssue(Unknown Source)
at com.xpandit.jiraxporter.component.service.XporterServiceImpl.generateReport(Unknown Source)
at com.xpandit.jiraxporter.servlet.IssueExportServlet.doPost(Unknown Source)
at com.xpandit.jiraxporter.servlet.IssueExportServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at com.atlassian.plugin.servlet.DelegatingPluginServlet.service(DelegatingPluginServlet.java:42)
...
see attachment.

Could you please help us solve this issue?
Thank you!
Best regards,
Loredana