Abstract: An apparatus for controlling a command retry widens an applied range of a retry function in an information processor for executing a program under pipeline control and aiding reliability, availability and serviceability of the information processor. The command retry control apparatus translates an instruction contained in the program into commands in a processable form and executes the processing on a command basis. The command retry control apparatus determines, if an error occurs during the execution of the command, whether or not an operand value is a normal value and executes, when the operand value is the normal value, a command retry by stopping inputting a next command. The command retry control apparatus continues the processing by resuming the inputting of the next command when normally finishing the command retry.