Error on connecting to discoverer plus

I'm triying to connect to Discoverer Plus or Viewer. When I get to the login screen, fill all the required fields, but I got the following message: "The application encountered an invalid state.
- - Nested exception: org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
OracleBI Discoverer Viewer was unable to find the necessary data for displaying the results of this event. Please correct any errors and try again."
can you please help me out so solve this prob.
the discoverer plus version is 10.1.2.48.18

Currently there is not enough information to realy de-bug the issue. I would look at the URL and verify that the URL with the connections page is the same as after entering the connection information. The URL can change if there is a Load Balancer or Proxy server involved.
Run the Discoverer script below to verify the Discoverer server is up and working.
$MidOH/discoverer/util > . ./checkdiscoverer.sh
Next look in the Discoverer application.log for additional information about the error. It is located at:
$MidOH/j2ee/oc4j_bi_forms/application_deployments/discoverer/oc4j_bi_forms_default_island_1
If these messages do
You are running an older release of 10g. The latest production release of 10g is 10.1.2.3 with Cumulative Patch 6 applied. See Note 237607.1 - ALERT: Required and Recommended Patch Levels For All Discoverer Versions. This Note is kept up to date.
Regards, -Sharon

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Thank you

Hello
Do you have a copy of my Discoverer 10g Handbook? If so, chapter 16 on pages 548 to 612 cover OLAP in some detail. This chapter was written by Mark Rittman, OLAP expert extraordinaire.
He also runs a blog which you may find to be of some help: http://www.rittmanmead.com/blog/
There is at least one Oracle by Example which may help: http://www.oracle.com/technology/obe/obe_bi/discoverer/discoverer_1012/index.html
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Actually i have to generate reports using Discoverer ,And i'm using jDeveloper ,so i want to call Discoverer from jdeveloper,so for that do i want to have any class libraries to be ?..
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Message was edited by:
user_di

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Error on connecting to discoverer plus

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