Yes, you will need to split the database. I would recommend these to start with:

Split Your Database - or the seminar would be even better
Access Online

You'll need to plan your online option if you're working on different networks/buildings. Access won't work by itself.

Awesome!  Thank you.

So, I tried to split the database, but it did not work.  What does the "Subscript out of range" error mean?

Compile your VBA code.

In the VB editor window, go to Debug > Compile [Database Name]. You'd be surprised what bad code in one Module will do to another. Usually this just highlights syntax errors, but you'd be surprised sometimes.

Always check the Troubleshooter first when you get weird problems.

Oh, for the love!  I have tried everything I can think of, and gone through your troubleshooter, too.  I have even gone form by form in my database and debugged every form.  I still get the Subscript Out of Range Error.  The BE file is created with all of the tables (which seem to be correct), but there is no Front End file -- that is no file with linked tables to the BE.

I am at my wits end here.  At this point, do I just need to split my database manually?

Have you tried splitting a new basically blank database and seeing if you get the error?

No, I have not tried that.  Guess I'll start there...

Well, that worked.  I tried a new database, a different database that I worked on earlier this year, and Rick's Beginner 1 database.  All split successfully.

I tried opening and splitting my college building database, and still get the same error: Subscript out of range.  Would my table relationships be causing the error?

Beau your relationships may very well be the issue.
I googled and read that that could cause issues.  To test it out make a backup copy - Just in case. (You should have already done that by the by)

I the copy go into the Database Tools -> Relationships and delete them all.  Save then compact and repair your db.
After that try to split your db.

Hopefully that will solve it!

I successfully split the database manually; however, I ran into a new warning.  When I opened the accde file, I got a trust warning.  Is that normal?  The database (accd file) was a trusted document before; I don't have the option now to make this a trusted document, so how do I fix this?

Nevermind.  I figured it out.  I had to save the desktop location as a trusted path.

Whew. I got tired just reading all that. LOL :)