This week I had to get Excel to run as a server object to serve an ASP.NET solution that I migrated from .NET 1.1 to .NET 2.0 and moved to a new server. Please spare me the comments on running Excel on the web server. That decision is/was not mine to make. Anyway; I got really reminded of how much I forget when I am not working with it. I think I once new all the COM-errors I encountered this week by heart.
Some things are best forgotten.