Weather file gives hour 0 error

Hi, I created my own weather file (attached) but when I try to run it I get the following error:

Hour 0 occurs after 8759 on line 4440 of weather file

I have the correct number of rows in the file, and while it looks like its the start of a new year in the data around that line number that it flagged a being an issue, I can't figure out why it is flagging an error.

Thanks so much, Jack

Hi Jack,

SAM expects the first row of data to be for Month = 1, Day = 1, Hour = 0. In your file, the first row is for June 30. You can fix that by rearranging the rows so that they go from January 1 to December 31.

It also looks like there are some out-of-range irradiance values that will cause a different simulation error. This look like missing data flags (-999). You will need to replace those values with valid values, perhaps by averaging the adjacent irradiance values.

Best regards,
Paul.

Thanks so much, that fixed it!