The tracking task is ending because an error occurred.
The tracing task ends. If message 26500 does not immediately precede this message, the parent task that spawned the tracing task continues and PowerExchange writes messages to the detail.log file instead of to alternative log files.
Review the earlier messages in the alternative logging file or detail.log file to determine the cause of the error. Then correct the error. When the task that spawned the tracing task is restarted, alternative logging resumes.