>>>How do I check whether the file c:\colinfile.xls exists
>>
>>Got it
>>
>>If file()
>
>For your information, file() doesn't always respect the folder you specify. If a file with the given name is in your current path, file() may return true, although you specify another folder. Adir() is a much better choice.

Aside from the path, there's also the bit about files that are included into the project (i.e. built into APP/EXE/DLL) always exist -- regardless of the folder you specify for it as parameter to FILE() function -- so in this case ADIR() is what you'll need to use to get the correct result.