ReplaceConnection() - missingParameterValueError

Question

In our project we must replace the connection saved within report.
To do that we are using replaceConnection() method and the way described by Thomas Zuberbue in
JRC 2: Performance Problem
To remind it it looks like:
// bag is a Map<String, String> and contains connection information
// doc is an existing instance of ReportClientDocument
prepareReport(doc, bag);
changeDataSource(doc, bag);
methods:
private void changeDataSource(ReportClientDocument doc, Map<String, String> bag)
      throws ReportSDKException {
    DatabaseController dc = doc.getDatabaseController();
    ConnectionInfos cis = dc.getConnectionInfos(null);
    for (IConnectionInfo oldci : cis) {
      IConnectionInfo newci = new ConnectionInfo();
      newci.setAttributes(new PropertyBag(bag));
      newci.setUserName("xxxx");
      newci.setPassword("xxxx");
      dc.replaceConnection(
          oldci, newci, null, DBOptions._useDefault + DBOptions._doNotVerifyDB);
    SubreportController src = doc.getSubreportController();
    IStrings strs = src.getSubreportNames();
    Iterator<?> it = strs.iterator();
    while (it.hasNext()) {
      String name = (String)it.next();
      ISubreportClientDocument subreport = src.getSubreport(name);
      DatabaseController sdc = subreport.getDatabaseController();
      cis = sdc.getConnectionInfos(null);
      for (IConnectionInfo oldci : cis) {
        IConnectionInfo newci = new ConnectionInfo();
        newci.setAttributes(new PropertyBag(bag));
        newci.setUserName("xxxx");
        newci.setPassword("xxxx");
        sdc.replaceConnection(
            oldci, newci, null, DBOptions._useDefault + DBOptions._doNotVerifyDB);
private void prepareReport(ReportClientDocument doc, Map<String, String> bag)
    throws ReportSDKException {
  DatabaseController dc = doc.getDatabaseController();
  IDatabase db = dc.getDatabase();
  for (Object table : db.getTables()) {
    ((ITable)table).setQualifiedName("userNameX".toUpperCase()
        + "." + ((ITable)table).getName());
We also use the subreport link copy procedure:
// preserve subreport links
        SubreportController src = reportClientDoc.getSubreportController();
        Map< String, SubreportLinks > linkMapper = new HashMap< String, SubreportLinks >();
        for( String subreportName : src.getSubreportNames() )
            linkMapper.put( subreportName, (SubreportLinks)src.getSubreportLinks( subreportName )
                .clone( true ) );
and
// AFTER DB connection REPLACEMENT
// reconnect subreport links since when using replaceConnection links are erased
         for(String subreportName : src.getSubreportNames()) {
             src.setSubreportLinks(subreportName, linkMapper.get(subreportName));
But after that we get:
com.crystaldecisions.sdk.occa.report.lib.ReportSDKParameterFieldException: InternalFormatterException---- Error code:-2147217394 Error code name:missingParameterValueError
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.if(SourceFile:237)
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(SourceFile:147)
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(SourceFile:128)
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(SourceFile:111
If we do not change the connection saved in the report, the problem does not appear  and report is exported.
What might be the problem

Answer 1

Hello i've resolved the problem
The issue is quite strange. As described - when there is no connection replacement the report is printed when connection is dynamically replaced above exception occurs.
I noticed that one of the subreport's parameters was not linked to the main report's parameter. The connection replacement revealed the problem - probably report keeps the data from the old DB connection and after changing the datasource old data is dumped.