When a formula references another file, what does Excel actually do? Does it get the relevant data directly from the file sitting in storage, or does it actually load the file into memory and not show it?
The reason I ask is that I'm using a UDF to evaulate a string as a formula. I have a naming convention based on dates. Basically I'm doing lots of 12 month rolling total/average type calculations. I've got 28 months of data in nicely namely spreadsheets. I've a master report that allows you to select the period you are interested in and the UDF works out which 12 individual monthly files to look at.
If I have the monthly files open, everything works fine, but if I don't it brings back zeros.
Any ideas?
The reason I ask is that I'm using a UDF to evaulate a string as a formula. I have a naming convention based on dates. Basically I'm doing lots of 12 month rolling total/average type calculations. I've got 28 months of data in nicely namely spreadsheets. I've a master report that allows you to select the period you are interested in and the UDF works out which 12 individual monthly files to look at.
If I have the monthly files open, everything works fine, but if I don't it brings back zeros.
Any ideas?
