thanks for the answers. I know the use of reset but i think that my question wasn't correct...when the reset is hight at the beginning I initalize my vectors and matrixs, than i have always blocks that rapresents a state machine that use reset signal, than when the execution start I want to initilize my matrixs and the I want that the execution flow of the state machine goes using the reset too. My intention of using reset isn't the usual manner, I think. my module isn't syntetizable, it have to generate trafic for a integrated network.