Pr og r am running out o f tr uck is a serious fault , w hich is usually caused by outside disturbance o r pro gr am err or . In this paper the cause of pro gr am running out o f tr uck is discussed, t he pro blem solving methods, the schemes of avo iding fr om pr og ram running o ut o f tr uck and m ethods r esum e the out tr uck pro gr am ar e sug-g est ed.