Hi, In my java application i am generating reports and i use JasperViewer as a print preview. When "saving as..." odt format my report is generated ok and i can open it with OpenOffice. The report looks ok and i don't receive any errors but my windows explorer (windows 7) gets closed and restarts by itself. After i shut down the computer or restart it each time i hover with my mouse over the odt document or i try to open/delete it the windows explorer restarts. I managed to move the document from command line to another computer running also windows 7 but the problem persists on the other computer too. I also opened OpenOffice and created an .odt document and saved it on my desktop. The document it is saved and i can open, move or delete it without any problems, so OpenOffice is working ok. I am using Java version 1.6, Windows 7 on 64bits and JasperReports 4.0.2