Hi Roger, Roger Aelbrecht wrote: >I am practivally sure that this message is not coming from the DLL >but because iut happens wehn the dll is active it is reported as being >from the dll. > >Are you using any event handlers in your application? >Then can you make them inactive as a test. > >It happened in the past that people were using e.g. a TMemo >to send all messqges from Zipmaster and got an overflow there and this >was reported as being originated in the DLL. > Thank you very much for your answer, but I don't compress a large number of files, I only tried to compress one file with a filesize up to 430 MB! But your answer was absolutly correct! For the display of the progressbar I used an integer var to calculate the position of the progress bar! Here I got the integer overflow. Using Int64 vars the system works fine! Thank you very much again! Regards Uli > > ----------- To unsubscribe from this list, send an empty e-mail message to: delphizip-request@xxxxxxxxxxxxx and put the word unsubscribe in the subject.