Excel Not Working Maybe you used to be able to open Excel files not working in ArcCatalog and ArcMap, or maybe your new installation won't open. You get this cool message when you try to open Excel files: This happens when your IT group moved you to Microsoft Office 365 in the cloud or you don't have Microsoft Office on your PC. ArcCatalog and ArcMap depend on some Microsoft Office system drivers being installed on your computer, allowing you to open Excel files in your GIS. Surely it would be great if the error message told you! How do you fix it? Just install the Microsoft Access 32-bit database engine. You will install a set of components that will be used to facilitate data transfer between Microsoft Office System 20xx files and non-Microsoft Office applications such as ArcCatalog and ArcMap. Remember, install the 32-bit version, not the 64-bit version, because ArcGIS Desktop is a 32-bit application.