I solved the issue. What i failed to mention was that I had two tasks start simultaneously and this caused the issues. Both tasks loaded from the same QVD files. The most curious this is though, it worked fine in QlikView.
In short, The solution was to prevent tasks from starting on the same trigger. but have them run consecutively.
I hope this helps.
Is your environment multi node or single node.. If multimode please check whether your Central, Scheduler and Engine servers are up and running and all the services from these 3 nodes are running. If not restart all the three servers..
If it is a single node then please check is there any space issues while the Load app is running and creating unnecessary logs if yes please clear space restart the server then initiate the task they should run fine
Move your schedule from 6 AM to some other time and to find it's happening only during that time.
If it's related to that time alone , see if any other jobs are running on the same time.
Also if it's standalone machine , check if any user activities. If it's development server, we have to ensure load of the resources during the time.
LDAP fetch during the time also can take quiet some resources.