Unexpected runtime error

The runtime has encountered an unexpected error.

Error source

Page Name:/xpFAQ.xsp
Control Id: container

Exception

com.ibm.xsp.exception.EvaluationExceptionEx: Error while executing JavaScript computed expression
Error while executing JavaScript computed expression
Script interpreter error, line=5, col=15: 'docFAQ' is null

JavaScript code

   1: 
   2: var idFAQ=context.getUrlParameter("id")
   3: var viewFAQ:NotesView = database.getView("H_Content_FAQ_byid");
   4: var docFAQ:NotesDocument= viewFAQ.getDocumentByKey(idFAQ)
   5: return docFAQ.getUniversalID()

Stack Trace