I know how to do all of it can be much more involved than you might think. If you are just getting one or two types of errors, you can use Excel formulas to mark them as whatever you want like 'Missing" but if there are lots of different types or errors in the same column, it can be pretty tricky. I used to teach classes on this stuff on there are lots of different solutions.

You can’t just do a search and replace because Excel math is formula based and the results are not text in computer terms at all. A math result could potentially be affected by the change to any cell that is referenced so it has to be dynamic unless you want to force it not to be.

A few hundred rows isn’t very big for an Excel spreadsheet. Your choices are to design some elaborate formulas to handle all of your errors or to simply to convert the whole thing to text results once you are happy with what you have and do a true search and replace on the converted text. The latter is much, much faster but isn’t ideal if this is something that you will need to do routinely.

**statij** gave a reasonable solution if you just want only one error message returned that includes all errors but I couldn’t really tell how elaborate the problem was based on your OP.