Performance Issue with BPC MS 7.0

Question

We are receiving error: "The underlying connection was closed:Unable to connect to the remote server.", when we optimize the application  or full processing the dimension. But, according to the TblLogs file the full optimizations are completing successfully although the client side error is received.
In Pre prod, when we tried to do all the above activities without citrix i.e., through the client installed on Server , we have not faced any hassels. It went fine. We are about to implement this in the Prod to isolate the issue. Problem while accessing the app through Citrix.
SAP also recommends to review the configuration of your Network Load Balanced (NLB) environment (WEB01) or Citrix deployment of BPC. But our teams says, everything is fine from their point. There is no flaw observed.
Paralelly, we have Increased Connection Time out levels @ IIS server level. Earlier it was 600 , we made it as 1200. Did Tbl logs table cleared. We have increased Time out Settings at DB level and OLAP level also as recommended by SAP. But no change in the error.
Any clue, what could be the reason for this after having the detailed investigation on the error as mentioned above.
This is so urgent, almost 150 users are getting effected.
Your immediate help would be appreciated.
FYI, we are using  BPC MS 7.0 SP12 and SQl Server 2008.
Many Thanks
Naga Jyothi

Answer 1

Hi Naga Jyothi,
this is a microsoft error message, there is probably an error on IIS settings or .NET.
If you filter the search on MS site you will found a lot of relevant threads, e.g. see
http://support.microsoft.com/kb/915599
(remember to check with your .NET framework)
Regards
     Roberto