I run an old dos program under ntvdm. If I sort 1 file then reload my program and sort another all is ok. If I try to sort 2 files the operating system does not give the second file the correct extension.
Eg. first file 1.idx is sorted using an internal temporary name of 1.0X but correctly renamed when written to 1.idx
Second file 2.idx is correctly written but has an extension of 2.0X not 2.idx
Any help greatly appreciated