Crystal Crashing when many users

Question

Hello,
I am having an issue with the code below:
            try
                crystalReport.Load(rptFilePath);
            catch (Exception ex)
                return("Error Loading Crystal RPT File (" + rptFilePath + "): " + ex.Message);
It works fine usually, but when I get many users trying to run a report at same time I get an Exception:
"Load report failed".
Furthermore once I get this exception it looks like no other users can run reports (as if the report component crashed).
I have to either reboot IIS or wait some time and it looks like the Crystal Component recovers on it's own.
I was warned that by using this free Crystal VS Component, I can only have max of 4 concurrent users calling it at the same time.
Is that the correct number about 4???
So I understand it is giving errors under heavy usage.
But it seems that t is also crashing after the first heavy usage and then no longer works after that.
Is there a way to make it recover without rebooting IIS or waiting a long time?
Thanks,
Yury

Answer 1

Hey Ludek,
Thank you for your response!
As far as:
2) You are launching too many Print Jobs (see below)
All my reports DO NOT have any Subreports.  They just have Groups & Detail(s).
Output as PDF or Excel.  So I do not think that it is issue, right?
1) You are not using .Close and .Dispose on the report objects once you are done with them.
I AM NOT using .Close and .Dispose so this sounds like the issue.
Please see my simple code below.
So do I just add 2 more lines at end?
            crystalReport.Close();
            crystalReport.Dispose();
Is that it or there something else I should be doing?
Thanks,
Yury
CODE
            ReportDocument crystalReport;
            string rptFilePath = System.Web.HttpContext.Current.Server.MapPath("~/Crystal/" + rptFileName);
            MemoryStream mStream;
            crystalReport = new ReportDocument();
            crystalReport.Load(rptFilePath);
            crystalReport.SetDataSource(DS.Tables[0]);
            mStream = (MemoryStream)crystalReport.ExportToStream(ExportFormatType.PortableDocFormat);