Error changing location from Details page

On the details page, I entered a new loacation of "Houston" and got this error:

PTC Webmasters

Server: Dev1

Error.getMessage(): java.lang.NullPointerException

java.lang.NullPointerException
at jsp_servlet._services._learning.__class_45_details_inc._jspService(__class_45_details_inc.java:535)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1072)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:526)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:348)
at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:638)
at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:423)
at weblogic.servlet.jsp.PageContextImpl.include(PageContextImpl.java:154)
at jsp_servlet._services._learning.__ptc_45_university_45_course_45_details._jspService(__ptc_45_university_45_course_45_details.java:196)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1072)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:526)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:348)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6981)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3892)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2766)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)

Request: GET /services/learning/ptc-university-course-details.jsp ? locationSearch=houston&latSelected=29.7632836&lngSelected=-95.3632715&dateStart=2009-10-28&dateEnd=2010-01-28

Full Path: /external/services/learning/ptc-university-course-details.jsp