Image processing apparatus, image processing method for the same, and recording medium

An image processing apparatus having functions installed thereon includes a job input portion that inputs a first job, a job storage that stores the first job, a job output portion that outputs the first job, a memory that allows allocating memory areas to the functions and reallocating the memory areas, a first judgment portion that judges whether or not the memory areas were reallocated after input but before output of the first job, a second judgment portion that judges whether or not output of the first job requires any unavailable function, a third judgment portion that judges whether or not the unavailable function will be available by restricting operations related to a second job and by adjusting the memory areas, and an operation restriction portion restricts operations related to the second job and adjusts the memory areas, wherein the first job is output while restrictions on the operations are effective.