"craxdrt9.dll" version "9.2.3.1368" errors at runtime with multiple threads STA

"craxdrt9.dll" version "9.2.3.1368" errors at runtime with multiple threads with ApartmentState as STA or MTA

I would appreciate any help on the following:

Keep getting the the following error from "Crystal Reports":

- Using "C:\Program Files\Crystal Decisions\Report Designer Component\craxdrt9.dll" version "9.2.3.1368"

Error on using multiple threads with thread.ApartmentState = ApartmentState.STA:

Object reference not set to an instance of an object.
at CRAXDRT.DatabaseTableClass.SetPrivateData(Int32 dataTag, Object data)
at TestCrystalReports1.QCrystalReports.QCrystalReportObject.processReport(IReport& iReport, Hashtable collReportDataRs, Boolean& m_btnCancelPressed) in E:\QECM\Tools\ReportingTools\TestApps\TestCrystalReports1\QCrystalReports\QCrystalReportObject.cs:line 127
at TestCrystalReports1.QCrystalReports.QCrystalReportObject.processSubReport(IReport& iReport, Hashtable collReportDataRs, Boolean& m_btnCancelPressed) in E:\QECM\Tools\ReportingTools\TestApps\TestCrystalReports1\QCrystalReports\QCrystalReportObject.cs:line 179
at TestCrystalReports1.QCrystalReports.QCrystalReportObject.runPrintJob(String rptFilePathStr, Hashtable recordsetHashTable) in E:\QECM\Tools\ReportingTools\TestApps\TestCrystalReports1\QCrystalReports\QCrystalReportObject.cs:line 81
at TestCrystalReports1.PrintRequest.runPrintRequest() in E:\QECM\Tools\ReportingTools\TestApps\TestCrystalReports1\PrintRequest.cs:line 79

Error on using multiple threads with thread.ApartmentState = ApartmentState.STA or ApartmentState.MTA:

Invalid directory.
at CRAXDRT.ApplicationClass.OpenReport(String pFileName, Object OpenMethod)
at TestCrystalReports1.QCrystalReports.QCrystalReportObject.runPrintJob(String rptFilePathStr, Hashtable recordsetHashTable) in E:\QECM\Tools\ReportingTools\TestApps\TestCrystalReports1\QCrystalReports\QCrystalReportObject.cs:line 77
at TestCrystalReports1.PrintRequest.runPrintRequest() in E:\QECM\Tools\ReportingTools\TestApps\TestCrystalReports1\PrintRequest.cs:line 79

Code extract - C# / .net application:

References: Interop.CRAXDRT.dll

- Thread running the "processReport" method - ApartmentState - tried both STA & MTA
- Problem usually occurs in case of multiple threads or multiple calls within a thread

private static int DATA_INPUT_TYPE_ADO = 3;

private void processReport (
ref IReport iReport, // Report instance
System.Collections.Hashtable collReportDataRs, // Report data
ref bool m_btnCancelPressed // Cancel button
)
{
// Get the database
IDatabase iDatabase = (IDatabase) iReport.Database;

// Get the database tables
IDatabaseTables iDatabaseTables = (IDatabaseTables) iDatabase.Tables;

// Loop through the tables
int iTotalTables = iDatabaseTables.Count;
for ( int iTblCount = 1; iTblCount <= iTotalTables; ++iTblCount )
{
if ( m_btnCancelPressed == true )
return;

// Get table name
IDatabaseTable iDatabaseTable = (IDatabaseTable) iDatabaseTables[iTblCount];

// Get the relevant recordset from the collection passed
System.String bsTableName = iDatabaseTable.Name;

ADODB._Recordset rs = (ADODB._Recordset) collReportDataRs [ bsTableName ];
if ( rs == null )
{
throw new Exception( "Data not found: " + bsTableName );
}

// Set data for this table
iDatabaseTable.SetPrivateData( DATA_INPUT_TYPE_ADO, rs);
}
}Are any of Dlls missing?
See if you find asnwer here
http://support.businessobjects.com/