Thanks for reminding me that "When all else fails, follow the directions." Yesterday was a clash between workload and trouble with Excel. I apologize for letting all my anxieties hang out and for asking for help with things that are in the directions. It was a bad day. Today is much different. I received my extra 2 Gb of RAM from OWC and installed it. Since the installation, I've not had any trouble at all with Excel, but I'll have to have a few days' work to decide that all problems are solved. For now, it looks good. Again, sorry for projecting a bad day onto the forum. I'll try not to do that again. grin


Mac Pro dual Quad-Core Intel Xeons Early 2008; 16GB RAM; MacOS X 10.11.6, iOS 9.3.5