Is it a 32 bit app or 64 bit? If 64, does it work at a client site when targeted for 32 bit? Another thing to check: Are all external referenced dll's in your app installed at the client site? did you verify the correct .net framework is installed? And do you have code in place to hand unhandled exceptions? Something like this:

http://www.switchonthecode.com/tutorials/csharp-tutorial-dealing-with-unhandled-exceptions
http://www.codeproject.com/kb/dotnet/unhandledexceptions.aspx
http://stackoverflow.com/questions/3317319/strange-issue-with-the-vs2010-debugger

or if separate threads:
http://stackoverflow.com/questions/4284986/c-catching-unhandled-exception-on-seperate-threads

Look at Application.ThreadException and AppDomain.CurrentDomain.UnhandledException


>I am really stuck here. This app runs fine on my PC, bhut when I try to generate the report on the client's server, I'm getting
>
>

>---------------------------
>Application Error
>---------------------------
>Application has generated an exception that could not be handled.
>
>Process ID=0x16d8 (5848), Thread ID=0x1170 (4464).
>
>Click OK to terminate the application.
>Click CANCEL to debug the application.
>---------------------------
>OK   Cancel   
>---------------------------
>

>
>Here's the code:
>
>

>
>private void _RunReport()
>{
>    try
>    {
>
>        // The selected project Id
>        int ProjectId = (int)cboProjects.SelectedValue;
>
>        // Create the project object
>        csCOSApp.ActiveProject = new csCOSProject();
>        csCOSApp.ActiveProject.ProjectId = ProjectId;
>        csCOSApp.ActiveProject.LoadData();
>
>
>
>        // Get the report's data using info from the active project
>        List<DbParameter> Params2 = new List<DbParameter>();
>        Params2.Add(new SqlParameter { ParameterName = "@ProjectId", Value = ProjectId });
>        Params2.Add(new SqlParameter { ParameterName = "@PrimaryWhseId", Value = csCOSApp.ActiveProject.PrimaryWhseId });
>        Params2.Add(new SqlParameter { ParameterName = "@SecondaryWhseId", Value = csCOSApp.ActiveProject.SecondaryWhseId });
>
>        DataSet dsProjectInfo = csCOSApp.DataLayer.ExecuteQuery("ap_GetProjectReportData", Params2, CommandType.StoredProcedure);
>
>
>        // Create an instance of the Crystal .RPT file
>        rptCorporateViewReport reportObj = new rptCorporateViewReport();
>
>
>        // Set the report's data source to the DataTable
>        reportObj.SetDataSource(dsProjectInfo.Tables[0]);       // <=====   APP DIES HERE
>
>        // Assign the report to the viewer
>        crlReportViewer.ReportObject = reportObj;
>    }
>    catch (Exception e)
>    {
>        logMessage(e.ToString());
>        throw e;
>    }
>}

>
>While I have made some slow progress in getting to this point, I need to deliver this report right now. Anyone see anything here?
>
>Thanks