I am using Borland Delphi 2006 and QuickReport 4 to try to preview a report. Sometimes the report preview goes blank. When the form is closed delphi throws an exception saying "Win32 Error: Code 1400. Invalid Window Handle".
If I try to preview the report again I receive the message "A compoent namned qrstandardpreview already exists ".
The only way to make any QuickReport in the program to work is to close the program and the start it again.
Have someone had the same problem and how did you solve it? Is there any use to upgrade to QuickReport 5?
My application runs on a Microsoft Vista Business OS but I do not know if this is of importance.
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