Techie lured out of retirement to support software only he remembered

ON CALL Happy System Administrator Appreciation Day, dear reader! And happy Friday, too, as it heralds both the end of the working week and the day on which The Reg delivers another edition of On Call, the reader-contributed column in which we share your stories of support jobs that twisted, tanked, or turned out terrifically. This week, meet a reader we'll Regomize as "Roger" who told us he spent decades providing application support for a UK-based software biz.