I have a Google Sheet (example) with a basic vlookup to create a summable column. It returns "#N/A" for every search key not found, and attaches the following error to those cells:
Error Did not find value '[email protected]' in VLOOKUP evaluation.
After much searching the only solution I found was to wrap the vlookup in an IF(ISNA()), given in How to link various Google spreadsheets using IMPORTRANGEs that contain VLOOKUP formulas without getting #N/A returned?. This works, but it really seems like I should not have to do this. Is there another way?
Update 2019-03-01: The best solution is now =IFNA(VLOOKUP(…), 0)
. See this other answer.