Formula Help, Sum by month

Hi I am trying to do a formula that sums that total system size value based on the month in a date column.
=SUMIF({NTP Date}, IFERROR(MONTH(@cell), 0) = 1, {System Size})
Best Answer
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Double check that the date column is in fact set as a date type. If it is, how exactly is it being populated and how exactly is the range you are summing being populated (and what column type is that)?
Answers
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Are you getting an error message or an inaccurate count? Your syntax looks correct, so we will need more details if you are having an issue.
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I keep getting the output of 0 for all months, which I know is incorrect.
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Double check that the date column is in fact set as a date type. If it is, how exactly is it being populated and how exactly is the range you are summing being populated (and what column type is that)?
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The date column was not set as a date! The formula is now working. Thank you!
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