Wsactask.exe crash all days at 5:00am Ifix 5.5

In a new Upgrade Scada, have this problem whit Ifix 5.5 (Windows 7).
3 times rebuild all, and the same
All days at 5:00am the data in the Scada, not continúe working, and need to restart the Scada.

Just in the event viewer have this error.

we check all PG Blocks and not have a tag that run a task at this time.

Any idea?

1000 Appication Error
Category: Application Crashing Events
Message: Faulting appication name: WSACTASK.EXE, version 5.5.8120.0, time stamp 0x4dedfc62d
Faulting module name: MSVCR100.dll, version: 10.0.30319.1, time stamp: 0x4baldbbe
Exception code: 0xe0000005
Fault offset: 0x00001ed7
Faulting process id: 0x1300
Faulting application start time: 0x01cea776e65ec7ac
Faulting application path: C:DYNAMICS\WSACTASK.EXE
Faulting module path: C:\windows\system32\MSVCR100.dll
Report Id: 6f9ce777-13b6-11e3-8956-000af715e3f8