TDAPIOLELib.Command limitations

Hi,

I am trying use TDAPIOLELib.Command for data extraction.

Sample code is below:

TDAPIOLELib.Command cmd = (TDAPIOLELib.Command)td.Command;

cmd.CommandText = 'Some SELECT statement i.e. from run table which returns many rows like 200 000'

TDAPIOLELib.Recordset rs = (TDAPIOLELib.Recordset)cmd.Execute();

Are there any limitations for row count , data buffer which can be returned to client machine ?

In most cases I got "Invalid server response" exception. Is there other way to extract data without access to HPALM DB schema ?

Thanks,

Peter