Web Service data source report causes Java memory leak

Question

Crystal Report designer fails to preview a report whose data source is a WSDL web service.  This happens when the Java run time process has exceeded the memory limit specified in the CRConfig.xml file.  The Java memory is never released by Crystal Reports until the Crystal Reports Designer is closed.  Version is Crystal reports 2008 (product version 12.2.4.507).
This error also occurs in the Crystal Reports Viewer when used in a Microsoft .NET application (framework 3.5) referencing CrystalDecisions.CrystalReports.Engine.dll v12.0.2000.0, CrystalDecisions.Enterprise.Framework.dll v12.0.1100.0, CrystalDecisions.Enterprise.InfoStore.dll v12.0.1100.0, CrystalDecisions.ReportSource.dll v12.0.2000.0, CrystalDecisions.Shared.dll v12.0.2000.0
I load the ReportDocument object based on the location of the .rpt file and then set the ReportSource object of the CrystalReportViewer control:
string FullReportName = "TestFile.rpt";
ReportDocument reportDoc = new ReportDocument();
reportDoc.Load(FullReportName, OpenReportMethod.OpenReportByTempCopy);
this.crystalReportViewer1.ReportSource = reportDoc;
reportDoc.Close();
reportDoc.Dispose();
GC.Collect();
The code displays the report in the report viewer.  However, every time the report is refreshed the Java runtime memory increases until the application cannot display the results.  The error messages are "Failed to retrieve data from the database." followed by "Cannot determine the queries necessary to get data for this report. Details: Unexpected error".  If you try to refresh the data once again the following errors occur: "Failed to retrieve data from the database." then "Cannot determine the queries necessary to get data for this report. Details: Schema file is invalid   Java heap space".
Increasing the java heap space in the CRConfig.xml file merely prolongues the onset of this error.
Is there a service pack or hot fix for this???
PLEASE HELP.

Answer 1

Many thanks for your help.  This solved the issue for our .NET code, however the leak is still present in the report designer.  I was also wondering if you could help further: because of the limits on the java memory process is there a way to ensure that a separate java process is started for each report that is loaded in my report viewers collection?  Essentially the desktop application that i have created uses a tab control to display each type report, so each tab goes through the following code when displaying a report and closing a tab:
Is there a way to ensure that a different Java process is kicked off each time that I display a different report?  My current code in c# always uses the same Java process so the memory ramps up.  The code to load the report and then dispose of the report through closing the tab (and now the Java process) looks like this:
    private void LoadCrystalReport(string FullReportName)
      ReportDocument reportDoc = new ReportDocument();
      reportDoc.Load(FullReportName, OpenReportMethod.OpenReportByTempCopy);
      this.crystalReportViewer1.ReportSource = reportDoc;
    private void DisposeCrystalReportObject()
      if (crystalReportViewer1.ReportSource != null)
        ReportDocument report = (ReportDocument)crystalReportViewer1.ReportSource;
        foreach (Table table in report.Database.Tables)
          table.Dispose();
        report.Database.Dispose();
        report.Close();
        report.Dispose();
        GC.Collect();
Thanks