"Error 500 -- Internal Server Error" When Accessing Gantt Chart, My Calendar, or Communication Center in P6

(Doc ID 1988096.1)

Last updated on AUGUST 22, 2016

Applies to:

Primavera P6 Enterprise Project Portfolio Management - Version 8.4.0.0 and later
Information in this document applies to any platform.

Symptoms

On : 8.4.0.0 version, P6 EPPM

When accessing Primavera applets (Gantt Chart, My Calendar, and/or Communication center) in P6 Web, the following error appears:

ERROR
-----------------------

Error 500--Internal Server Error
javax.servlet.jsp.JspException: ServletException in '/WEB-INF/jsp/struts/portfolios/gantt/portfolio_gantt.jsp': Failed to compile JSP /WEB-INF/jsp/struts/portfolios/gantt/portfolio_gantt.jsp
portfolio_gantt.jsp:333:6: The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files
if ((to.getChildren() != null) && (to.getChildren().length > 0))


BUSINESS IMPACT
-----------------------
The issue has the following business impact:
Due to this issue, users cannot access Primavera applets (Gantt Chart, My Calendar, and/or Communication Center).

Cause

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