DU file is missing without a reason

Issue/Introduction:

Error Message :
in universe.log

#####
| 2015-05-13 11:15:00 |ERROR|X|IO |pid=7472.7080| u_io_error | file open error 2: No such file or directory (C:\ORSYP\DUAS\NODEPRD_BATCH_MASTER\data\exp\u_fmcx60.dta)
| 2015-05-13 11:15:00 |ERROR|X|IO |pid=7472.7080| u_load_buffer | error 7 reading buffer
| 2015-05-13 11:15:00 |ERROR|X|IO |pid=7472.7080| u_io_error | file open error 2: No such file or directory (C:\ORSYP\DUAS\NODEPRD_BATCH_MASTER\data\exp\u_fmcx60.dta)
#####

Patch level detected:Dollar Universe 6.2.00
Product Version: Dollar.Universe 6.2.0

Description :The symptoms depends on which file is missing
Some abnormal symptoms, such as cannot open Job log/history trace, all jobs aborted, ...

Cause:

Cause type:
Other
Root Cause: Issue appears because a daily backup is done on DU files without stopping Dollar Universe.

Environment:

OS: Windows Server 2003

Resolution:

This issue can be fixed by either:
- Stop DU before doing the backup
- Use DU internal backup command to backup DU files

Starting Dollar Universe 6.3, the data file format is different.
It's why issue should not appear but we still recommend to avoid external backup of Dollar Universe directories when this one is still started.

Fix Status: No Fix

Additional Information:

Workaround :
N/A