Problem into reset trigger node function

Hi guys, I've seen that if I transfer the reset trigger of a task executer into a node function belonging to a DLL code, the task executer labels are not seen and if I try to use the assertlabel function then the content of the task executer label are cleared, whereas if I leave the code of Reset trigger as FlexScript the labels are seen and their values are not reset. Actually I'm using the version 7.5.2 of FlexSim.
Thanks in advance for Your answers.