Nonstop backup lock up Crystal Reports files

Hi,

I like to report a problem with Acronis Nonstop backup locking up Crystal Reports files.

The symptom:
I am using Crystal Reports working on a report file. I am doing frequent saving. Eventually Crystal Reports will not able to save the report file, saying that file is locked by another program. The report file is visible in File Explorer, but could not be opened or modified by any other programs. Eventually the file will disappear.

The problem disappears after I disabled Acronis Nonstop backup.

Acronis 2013 Build 6514
Crystal Reports 2013 SP1 (version downloaded 1 Sep 2014)
Widows 7
Backup to SAN drive over wifi network