V-79-57344-33861 - The media operation was terminated by the user.

Hello All , 

I'm using Backup Exec for years without a problem .. Recently my Backup Exec 2010 R3 , started to give me some troubles .. accessing some folder , which it used to access normally .. but it started to give error "Path not found" , or "access Denied" , i looked for every way to solve it and it didnt work ,

Eventually i created a seperate job for that path , and it was working .. but not the old job ..

anyway .. after abit or researching .. i found someone in the community suggesting to create a new Selection List .. I did .. and of course it created a new jobs completely .. anyway .. long story short ..i faced another issue ..

I have Daily Incremental Backup , and weekly full backup ... and the backup happen in two steps .. disk to disk , then dublication to tape ..

The Problem 

For Incremental no issues .. For the weekly it got canceled by timing out .. as my weekly backup takes around 50 Hours to complete .. it cancel the job after 8 Hours ..

I researched again in the forum and found this :

Disable the Option "Enable automatic cancellation for selection list" in Backup Exec under:
 
Tools | Options | Priority and Availability or Backup Job Properties | Source | Priority and Availability. 

I found the option was enabled .. so i disabled it .. i dont know why it was re-enabled .. i never faced this issue before .. anyway .. waited for the second week .. and it still happening .. the job is canceling after exactly eight hours .. i thought may be i need to restart the services .. and it didnt work .. then i though ok i'll reanble it and increase the AutoCancelation option to 100 Hours .. and it didnt work .. still exactly 8 hours and it cancel .. 

The error is : 

Job Completion Status 
Job ended: Friday, August 22, 2014 at 5:00:12 AM
Completed status: Canceled, timed out
The job was automatically canceled because it 
exceeded the job's maximum configured 
run time.

Errors 

Click an error below to locate it in the job log
Backup- D:V-79-57344-33861 - The media operation was terminated by the user.

The Job Schedule is as per the below photo .. 

Can anyone help me with a solution pls ??