Quite difficult to guess the cause.
Can you please post your complete project or a shortened version that shows the error so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.
Thanks for the reply Bob, I will do it later today, but I found a workaround, instead of executing the functions call from the interrupt, I raise a flag and execute them from the main loop.