For some reason, when I generate a file that I'd like to use the XLC utility with, I inevitably get about halfway through - then it bugs out and closes - when I re-open the file (assuming I have saved it before bugging out) the XLC toolbar cannot be found. I have to rerun the setup.exe and then open a new file. Must be doing something wrong?
Also, the XLC toolbar seems to only be available to new files - why can't I open the toolbar with an existing workbook?
TKS

We have not had many installation issues reported in recently so thanks for letting me know your bug. Your problems sound strange so let's do a few checks to see what's happening.

1) Start Excel. Go to Tools>Add-Ins... This displays the Add-ins form and check that xlc is shown as installed. If OK then proceed.

2)Is the XLC toolbar visible? Check Excel MainMenu>View>Toolbars> and XLC Tools should show with a check mark next to it. If OK then proceed.

2) Check that XLC function are working. Type "=OVD(3)/und(6)" into a cell. If the cell returns 0.5 then XLC functions are working OK. If OK the proceed - if not install XLC.xll manually by following these instructions. From the add-ins form select the browse button and navigate to your XLC installation directory (normally this is Crogram Files>XLC unless you installed it elsewhere). Select the xlc.xll and press 'OK'. This has manually installed xlc.xll

Let me know how you get on.

Figured it out. Some bug in my computer that was not happy with Excel - not XLC. I closed everything and re-installed the add-in. I haven't had another issue since.
Thanks for your help.