Boxcryptor corrupts files!

bolide

hi!

I've noticed a really annoying thing. I have the latest BoxCryptor installed on all computers. I have a three always online and always syncing (Dropbox+Boxcryptor) computers.

Now, when I am editing HTML file with Notepad++ (or with Evrsoft 1st Page) that is located in the crypted folder and saving the file, I am getting the strange results. If the saved file is larger in size, all is ok. If the saved file is smaller, I've got it saved, but it remains the same size and appended the old contents at the end of file! When I am editing and saving the same file with internal FAR editor, I got correct file. This is really weird.

Why it happens and how to fix it?

Robert

This behavior is not known. Could you give me some more information about your software setup and how you use BoxCryptor? Which version of Notepad++ (and Windows) do you use?

Also, could you please restart BoxCryptor with the debug option (Start -> "BoxCryptor.exe /debug") and send me the created BoxCryptor.log from your Desktop to contact at boxcryptor dot com?

bolide

the computer where I edit HTML files has Windows XP installed, the other two are with Windows 7 64 bit.

Notepad++ is quite old, v5.5.1

I don't think this issue is related to Notepad++. I noticed this first with "Evrsoft 1st Page" editor, but thought it was related to Evrsoft, because this program is not so stable. However, I am using it for a long time and got corrupted files only after I started to sync my computers with Dropbox+Boxcryptor.

When I noticed the same issue with Notepad++, I wrote the message here.

I just sent the debug log to you.

Robert

Thanks for the log. I'll investigate this issue.

bolide

if I edit HTML file inside of unencrypted Dropbox folder, everything is fine, therefore I think it is BoxCryptor-related issue

bolide

Robert, can you reproduce this issue on your computer?

Robert

Sorry, I can not reproduce this issue on my (or any of our test machines) with Notepad++ 5.5.1 (or the latest version). But I'll keep investigating it. Do you have any anti-virus software installed?

bolide

Yes, I have anti-virus software. I'm doing some experiments in order to find out the reason. First, I have to say that I can't reproduce this issue on another computer (Windows 7 x64, dropbox folder is on fast SSD, Free Avira Antivirus). BoxCryptor works fine there.

Keeping experiment with the "problem" computer with Windows XP and DrWeb Spider Guard as anti-virus software. Disabling antivirus doesn't help.

bolide

I've rebooted Windows XP computer and killed as much processes as I can, even Dropbox. Here is the screenshot of the task manager: http://www4.picturepush.com/photo/a/6790727/img/Anonymous/processes.jpg
And I still got wrong file saved by notepad++ and correct file saved with Far editor.
Now analyzing the log file I got with /debug option after I edited and saved the same file with notepad++ and Far editor. It seems, they save files in different ways

bolide

This way FAR saves the file and it works well:

bolide

And here is the log of saving the same file with the same changes by notepad++:
(note, no setendoffile there, the file size in WriteFile is correct, but when I am reading the file right after saving in in that way, I got the file size of 9777 as it was unmodified instead of the correct 9763):

bolide

My guess - the driver you are using for Windows7 x64 processes the second case correctly, while the one for Windows XP fails. Unfortunately, I have only one XP computer and can't test it on another

Robert

Thanks for experimenting! There's some interesting information in your posts. I'll do some more research on my own and will post my findings here.

bolide

Let me know if you need to test something regarding to this issue

neiaberau

Similar issue, but as I did not look into details, I do not know if it is the same or something else. When I started using Boxcryptor 1 month ago, I had twice an excel file corrupted. Was an old excel version on my old XP notebook. Initially I only used boxcryptor on this machine, so influence on other installation I can rule out.

Now I migrated to a Windows 7 installation, I had no issues so far, but still feel a little uneasy about it. Is the cause of the issue known, is it restricted to XP only? is it a boxcryptor issue or a dropbbox issue?