Such a simple thing creating so many problems. You were right, the preview window was the problem, so thanks again for responding! You learn something new every day!

Thanks for your suggestions, i will close explorer before saving and see what happens

I mean saving from designer to my local files, client side before the pdf is uploaded on server.

Sorry, need to be more specific, I did compatibility settings in explorer because the completed pdf form is auto generated and populated from a web based application called Collaborator and the preferred browser is Explorer. The problem is in Designer es4, I insert encryption in the form on the subm...

I use chrome?

After editing a form I can't save the form to the same file name. I receive the following message:Needless to say, the form is not shared or open anywhere else.I've set permissions on the file, folder and designer, I've set compatibility on the urls,  but nothing makes a difference. Imagine saving e...

After editing a form I can't save the form to the same filename. I receive the following message:Needless to say, the form is not shared or open anywhere else.I've set permissions on the file, folder and designer, I've set compatibility on the urls,  but nothing makes a difference. Imagine saving ev...