Qt App and NCReport

**Kclark** · 10th January 2011, 13:37

I tried using NCReport in my application as a component for reporting services. I am using Visual Studio 2008 and Qt 4.5.3 for development and I have also installed a specially build version of NCReport compatible to Qt 4.5.3. Since I have VS solution, so my projects are not .pro and are .vcproj.

Instead of editing my .vcproj I have added the necessary dlls (ncreport2.dll, ncreportd2.dll), included the include folder, added the necessary library and also copied some of the dlls available in the (NCREPORT INSTALL FOLDER)/bin directory to my projetc's debug directory.

Now my code is

Qt Code:

Switch view

report = new NCReport();
	report->reset(true);
	report->setReportFile(QString(QApplication::applicationDirPath() +  
                                                 QDir::separator() + "reports" + QDir::separator()  
                                                 + "MitigationAnalysis.xml"));
	output = 0;
	output = new NCReportPreviewOutput();
	output->setAutoDelete( false );
	report->setOutput(output);
	report->runReport();
	if(!report->hasError())
	{
		pv = new NCReportPreviewWindow();
		pv->setReport( report );
		pv->setOutput((NCReportPreviewOutput *) output);
		pv->setWindowModality(Qt::ApplicationModal);
		pv->setAttribute(Qt::WA_DeleteOnClose);
		pv->show();
	}
else if( report->hasError())
	{
		bool error = report->hasError();
		QMessageBox::about(this,"Error in Report", report->lastErrorMsg());
	}

report = new NCReport();
	report->reset(true);
	report->setReportFile(QString(QApplication::applicationDirPath() +  
                                                 QDir::separator() + "reports" + QDir::separator()  
                                                 + "MitigationAnalysis.xml"));
	output = 0;
	output = new NCReportPreviewOutput();
	output->setAutoDelete( false );
	report->setOutput(output);
	report->runReport();
	if(!report->hasError())
	{
		pv = new NCReportPreviewWindow();
		pv->setReport( report );
		pv->setOutput((NCReportPreviewOutput *) output);
		pv->setWindowModality(Qt::ApplicationModal);
		pv->setAttribute(Qt::WA_DeleteOnClose);
		pv->show();
	}
else if( report->hasError())
	{
		bool error = report->hasError();
		QMessageBox::about(this,"Error in Report", report->lastErrorMsg());
	}

To copy to clipboard, switch view to plain text mode

When I try to run this code the program throws and Access Violation Exception reading location........ and breaks at the line report->runReport(). No other information and I get confused about what to do.

Now, accidentally I tried to change the Filename of report and gave some wrong input string to it , and what I see is that the program doesn't break and shows me the last error message occurred in the report.

I am unable to understand this behavior. I am developing my application on WINDOWS XP (service pack 3). Please guide me if any one has faced the same problem or do me this favor.

Thanks