Explanation
The workbench cannot communicate with the agent computer. The agent computer might have a memory allocation problem.
User response
Try running the schedule again, using the default values for Test Log and Problem Determination log levels.
Follow the instructions in Increasing memory allocation. Set the memory allocation to the size of physical memory minus 256 megabytes, up to a limit of 1500 megabytes. For example, on an agent computer with one gigabyte of physical memory, set the memory allocation to 756 megabytes.