The viewing session is not available or has expired with Tomcat 7

I installed the BIRT Viewer in Apache Tomcat 7, but I have this error when running a report on the application:

java.lang.IllegalStateException: The viewing session is not available or has expired

I have made same steps in another PC and everything went well.

I read many posts that talk about 开发者_如何学运维it, but neither of the solutions have resolved the problem. The main one was this.

Though application worked fine in Firefox and Chrome, I have experienced same error in IE browser only when report is opened within iframe and only when frameset is used.

There are two ways to fix this:

1. Reduce security in IE to low or add the site to trusted.

2. Before opening report in iframe, call Ajax function to some test report.

   For ex:

   ajaxRequest.open("GET","http://localhost:8080/birt/frameset?__report=test.rptdesign");
   

I have to opt for second option, because in my situation I cannot ask my users to reduce security or trust our site.

I had this issue but my problem was the url-path of report, look:

My Iframe:

<iframe src="#{var.ipserver}/birt/frameset?__report=report/report/balance/balance_card.rptdesign" width="900" height="600"/> 

When the iframe was rendered in the browser the url was:

<iframe src="http://192.168.0.111//birt/frameset?__report=report/balance/balance_card.rptdesign" width="900" height="600"></iframe>

there is double slash after IP, this was the problem, when I fixed it (as you can see below) it worked!!

  <iframe src="#{var.ipserver}birt/frameset?__report=report/report/balance/balance_card.rptdesign" width="900" height="600"/>