I have downloaded XLC 06_07 Installation.zip and unzipped it into a temp directory. Unfortunately the security settings on my machine prevent me from executing the setup.exe file. IT dept. will not give me access to install either.

So, I tried installing manually. I unpacked the XLC.CAB and tried adding the XLC.xll file through Excel with Tools>Add-Ins. While XLC shows up in the Add-In list and the equations are available and do not through a #NAME error, no toolbar and no equation pictures are generated. All the files for XLC are in the same folder. What else do I have to do for a manual installation ?

-Pete Wilk

I am not sure if this will work for you as you may not have the rights to install manually either but you could try it and let me know how you get on.

There are two files Excel needs to have installed separately 1)XLC.dll (this is the toolbar component) and 2)XLC.xll (this contains special XLC functions).

PART 1 - Manually Install XLC.dll
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Follow these instructions to register manually:
1) goto start button and select 'run'
2) type in 'cmd' this will get up a command prompt window.
3) Navigate to the xlc install directory (use 'cd' commands)
4) check using 'dir' that two files are present XLC.dll and XLC.xll
5) Register XLC.dll by typing 'regsvr32 XLC.dll' into the command prompt window. - you should get a message saying you have succeeded in registering.
6) Hopefully you can see the toolbar when you start Excel.

PART 2 - Manually Install XLC.xll
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7) In Excel go to Tools>Add-Ins... This displays the Add-ins form.
8) From the add-ins form select the browse button and navigate to your XLC installation directory (normally this is C:\Program Files\XLC unless you installed it elsewhere). Select the xlc.xll and press 'OK'. This has manually installed xlc.xll
9) Close Excel and restart it again.
10) If all went well when you enter "=ovd(1)/und(2)" it will evaluate it as 0.5 and not give any "#NAME" error messages.

XLC is installed and working.

Good Luck Pete

Those instructions worked out fine. Thanks!