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"Invalid Class String" error

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michaelmichael

Programmer
Aug 14, 2001
4
US
I have an installation as follows:

Windows 2003 Server
Crystal Reports 10 Advanced Developer Edition
Visual Studio 2003

In a nutshell,
using VS2003 I create an ASP.Net Web Application -
I add a webform - on the webform
I add a CrystalReportViewer -
I set the reportsource for the viewer with a custom binding expression: "c:\report1.rpt" -
On Page_Init event I add: CrystalReportViewer1.DataBind()-
I get the error: "Invalid Class String:

Here is the stack dump:

Invalid class string
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: Invalid class string

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[COMException (0x80004005): Invalid class string
]
CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocumentClass.Open(Object& DocumentPath, Int32 Options) +0
CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.Open(Object& DocumentPath, Int32 Options)
CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened()

[Exception: Load report failed.]
CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened()
CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename, OpenReportMethod openMethod, Int16 parentJob)
CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename)
CrystalDecisions.ReportSource.NonHTTPCachedReportSource.GetReport(RequestContext context, Boolean bAddToCacheWhenCreated)
CrystalDecisions.ReportSource.LocalReportSourceBase.GetPage(PageRequestContext pageReqContext)
CrystalDecisions.Web.ReportAgent.(Boolean n)
CrystalDecisions.Web.CrystalReportViewer.OnPreRender(EventArgs e)
System.Web.UI.Control.PreRenderRecursiveInternal()
System.Web.UI.Control.PreRenderRecursiveInternal()
System.Web.UI.Control.PreRenderRecursiveInternal()
System.Web.UI.Page.ProcessRequestMain()

------------
Thinking it must be a config problem. Anyone have a clue?



 
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