Hi, here is what I am doing: I have 5 running tasks with different task repeat times and an external interrupt. The interrupt fires every ms and some data is sampled and stored to a buffer. The task with the highest priority reads the data from this buffer and sends it via queue to another task. All tasks are running for a while but after some time this one task stops executing while the others are still running.
Has anybody an idea what causes this? Thanks,
Rogério!

Impossible to say without being able to debug your application. I would be quite certain it is an application issue though. www.freertos.org/FAQ-how-to-use-the-FreeRTOS-support-forum.html