Abstract: Conventionally, there is the problem that a source program that is to be converted cannot be properly analyzed and the conversion ratio cannot be improved.

Abstract: Automatic program conversion method: An analysis step analyzes the number of times that first instruction pattern information elements appear in an old source program; an analysis results output step outputs the analysis results; an instruction pattern conversion step converts old source program descriptions that correspond to the first instruction pattern information elements analyzed to appear a specified number of times or more, so as to correspond to second instruction pattern information elements; a new program output step outputs a new program resulting from the old source program converted in the instruction pattern conversion step; and an input receiving step receives user-entered manual input regarding the descriptions in the old source program that correspond to the first instruction pattern information elements analyzed to appear less than the specified number of times, so that such descriptions are modified for a new source program. Thus, program migration is achieved efficiently, reducing bugs.

Abstract: Conventionally, there is the problem that a source program that is to be converted cannot be properly analyzed and the conversion ratio cannot be improved.