I have a big project (big by my amateur standards, when I was using floppy discs it just fitted on one) which requires regular input of data then saving. Until recently I have always transferred it via flash memory to my laptop (same version and release) and occasionally saved it there and transferred it to the desktop, and then emailed it to my office (Excel 2000) as a further backup.
I now find that when I transfer it to the laptop it will not open; Excel tries to repair it but the names of my cells and arrays have invariably disappeared. Similarly when I email it to the office it will not open it and Excel simply reports "unable to open file".
Any ideas? It hasn't got any bigger and I haven't added any new variable.