One more thing: I don't get " Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)" type error.
edit.
I found the way to turn on "full error reporting". Here's more info:
Stack Trace:
[ReportServerException: For more information about this error navigate to the report server on the local server machine, or enable remote errors]
[ReportServerException: Cannot create a connection to data source 'CRM'. (rsErrorOpeningConnection)]
[ReportServerException: An error has occurred during report processing. (rsProcessingAborted)]
Microsoft.Reporting.WebForms.ServerReportSoapProxy.OnSoapException(SoapException e) +82
Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.ProxyMethodInvocation.Execute(RSExecutionConnection connection, ProxyMethod`1 initialMethod, ProxyMethod`1 retryMethod) +770
Microsoft.Reporting.WebForms.ServerReport.SetDataSourceCredentials(IEnumerable`1 credentials) +401
Microsoft.Crm.Web.Reporting.SrsReportViewer.SetExecutionCredentials(ServerReport reportObj) +495
[CrmReportingException: An error occurred during report rendering.]
Microsoft.Crm.Web.Reporting.SrsReportViewer.SetExecutionCredentials(ServerReport reportObj) +690
Microsoft.Crm.Web.Reporting.RemoteSrsReportViewer.LoadReportAndSetParameters() +1260
Microsoft.Crm.Application.Controls.AppUIPage.OnPreRender(EventArgs e) +106
System.Web.UI.Control.PreRenderRecursiveInternal() +113
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4201
Error Description:
An error occurred during report rendering.
Error Details:
An error occurred during report rendering.
Full Stack:
[ReportServerException: For more information about this error navigate to the report server on the local server machine, or enable remote errors]
[ReportServerException: Cannot create a connection to data source 'CRM'. (rsErrorOpeningConnection)]
[ReportServerException: An error has occurred during report processing. (rsProcessingAborted)]
at Microsoft.Reporting.WebForms.ServerReportSoapProxy.OnSoapException(SoapException e)
at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.ProxyMethodInvocation.Execute[TReturn](RSExecutionConnection connection, ProxyMethod`1 initialMethod, ProxyMethod`1 retryMethod)
at Microsoft.Reporting.WebForms.ServerReport.SetDataSourceCredentials(IEnumerable`1 credentials)
at Microsoft.Crm.Web.Reporting.SrsReportViewer.SetExecutionCredentials(ServerReport reportObj)
[CrmReportingException: An error occurred during report rendering.]
at Microsoft.Crm.Web.Reporting.SrsReportViewer.SetExecutionCredentials(ServerReport reportObj)
at Microsoft.Crm.Web.Reporting.RemoteSrsReportViewer.LoadReportAndSetParameters()
at Microsoft.Crm.Application.Controls.AppUIPage.OnPreRender(EventArgs e)
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
[HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown.]
at System.Web.UI.Page.HandleError(Exception e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Other Message:
Error Number: 0x8004832C
Source File: Not available
Line Number: Not available
Error Trace:
Date: 10-11-2012
Time: 16:16:42
Server: crm
Request URL: http://crm/thisismycompanynamerighthere/CRMReports/rsviewer/reportviewer.aspx