Crystal Report 2013 memory problem

Question

Hi,
I am developing a Windows service. The service calls Crystal Report to generate PDFs. When a new contract appears in database (MS Access), the service reads contract number and build a formular. Then pass the formular to ReportDocument. The code looks like this
using (ReportDocument report = new ReportDocument()) {
  report.Load("contract.rpt");
  // some initialize report
  foreach (var contract in contracts) {
    report.RecordSelectionFormula = BuildFormular(contract);
    report.ExportToDisk(ExportFormatType.PortableDocFormat, BuildOutputFilename(contract));
  report.Close();
It works fine. When deploy on production, I want the location of Access file can be changed programmatically. So I modified the code
using (ReportDocument report = new ReportDocument()) {
  report.Load("contract.rpt");
  // some initialize report
  foreach (ReportDocument subreport in report.Subreports) {
     foreach (Table table in subreport.Database.Tables) {
       table.Location = MdbPath;
  foreach (Table table in report.Database.Tables) {
    table.Location = MdbPath;
  foreach (var contract in contracts) {
    report.RecordSelectionFormula = BuildFormular(contract);
    report.VerifyDatabase();
    report.ExportToDisk(ExportFormatType.PortableDocFormat, BuildOutputFilename(contract));
  report.Close();
It works but memory increases over time. Here are Private Bytes (I use Performance Monitor tool)
10:45 - 58.000MB
11:00 - 61.801MB
11:15 - 64.611MB
11:30 - 65.544MB
11:45 - 65.716MB
12:30 - 69.095MB
I also attached some screenshot of report of DebugDiag tool.
My environment:
Net framework 4.5
Tool runs as Windows Service
Crystal Report 2013 (Crystal Report Runtime 32bit 13.0.10.1385).
Database: MS Access/OleDb
Any suggestion?
Many thanks

Answer 1

Hi Ludek,
I wrote 3 tests. You can get detail here:
https://dl.dropboxusercontent.com/u/4059883/WinFormSavedData.zip
https://dl.dropboxusercontent.com/u/4059883/WinFormSavedData.Statistic.docx
https://dl.dropboxusercontent.com/u/4059883/WinFormNoSavedData.zip
https://dl.dropboxusercontent.com/u/4059883/WinFormNoSavedData.Statistic.docx
https://dl.dropboxusercontent.com/u/4059883/WinFormChangeLocation.zip
https://dl.dropboxusercontent.com/u/4059883/WinFormChangeLocation.Statistic.docx
Here are summary:
Tests are a Windows Form apps with one main form which has one button. If we click on the button, it call Crystal Report to generate 100 pdf. The Access database is simple - one table which has 10 records.
Test case 1 - Saved data report.
I clicked 7 times (700 pdf created). Memory increase from 40.177 MB to 43.347 MB
Test case 2 - No saved data report
I clicked 10 times (1000 pdf created). Memory increase from 41.123MB to 42.835MB
Test case 3 - No saved data report and change location
I clicked 10 times (1000 pdf created). Memory increase from 52.412 to 54.063MB
Because I am developing a Windows Service and it runs 24/7, I expected that memory should not increase over time. My service runs 2 or 3 days and Crystal Report throws exception "Not enough memory for operation"
00:00:11,276 [Worker-8] ERROR e.PdfGenerator.PdfGeneratorJob - Error while generating pdf
CrystalDecisions.Shared.CrystalReportsException: Load report failed. ---> System.Runtime.InteropServices.COMException:
Not enough memory for operation.
   at CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocumentClass.Open(Object& DocumentPath, Int32 Options)
   at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.Open(Object& DocumentPath, Int32 Options)
   at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened()
   --- End of inner exception stack trace ---
   at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened()
   at CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename, OpenReportMethod openMethod, Int16 parentJob)
   at CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename, OpenReportMethod openMethod)
Thank for all advice
Vi