Updating microsoft excel
I stripped the quotes and the cells calculated as normal.
In my instance I was using a particular add-in called PI Datalink.
What I found to be the problem was the formula and the fact that I surrounded numbers with quotes.
Three attempts later and it was still adamant it wanted to be "Manual" and nothing else.Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.