Data lost after several days running!

Question

data lost after several days running
ENV:
Service Pack 1 for Crystal Reports for Eclipse 2.0
Tomcat5.5
Problem:
There is no problem to export the report as PDF files in the first few days after i upgraded the CR4E.
But after several days running,the problem appeared : the exported PDF file was incomplete!
It's supposed to 3 pages,but only 1 page(the first page) exported actually.
When i restarted the tomcat,the problem disappeared.In several days running,
the problem appeared again...
Code:
reportClientDoc = new ReportClientDocument();
reportClientDoc.open(Messages.getString("tmpltPath")+tmplt_name, OpenReportOptions._discardSavedData);     
RptHelp  rptHelp = new RptHelp();
rptHelp.setDatabaseCtrl(reportClientDoc);
rptHelp.addDiscreteParameterValue(reportClientDoc,"","userName","admin");
rptHelp.addDiscreteParameterValue(reportClientDoc,"","start_date",start_date);
rptHelp.addDiscreteParameterValue(reportClientDoc,"","end_date",end_date);
for(int i=0;i<6;i++){
     if(!p_name<i>.equals("")){
          rptHelp.addDiscreteParameterValue(reportClientDoc,"",p_name<i>,p_value<i>);
String exportPath = Messages.getString("reportExportPath");
String exportName = "test";
rptHelp.export(reportClientDoc, exportPath+exportName, file_extention);
File file = new File(exportPathexportName"."+file_extention);
FileInputStream in = new FileInputStream(file);
int len = (int)file.length();
byte[] data = new byte[len];
int read = 0;
while (read <len) {
    read += in.read(data, read, len-read);
in.close();
response.setContentType("application/x-msdownload");
response.setHeader("Content-Disposition", "attachment; filename="+ URLEncoder.encode(exportName"."file_extention,"ISO-8859-1"));
OutputStream ops = response.getOutputStream();
ops.write(data);
ops.flush();
ops.close();
out.clear();
out = pageContext.pushBody();

Answer 1

What is the data? What is displaying the data (graph or chart)? What does your code look like? Why did you post a 4M image to the forum?
NaN in the data will appear as gaps in plots.
Mike...
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