Weather issues between SAM 20.2.29 release 3 and release

Hi Paul

EPW weather files and my own SAM sb-hourly CSV files that were working with release 2 are no longer valid when working with release 3. I have re-installed release 2 and I am back working fine, and the issues below disappear.
 
Issue1)
Using release 3, with my ownSAM CSV sub-hourly weather files, execution fails with: “Weather file hour range was not (0-23) or (1-24)”. Hourly files work fine. I have attached my sub-hourly file.
 
Issue2)
Using hourly EPW files from climate.onebuilding.org/ causes the following issue
 
exec fail(pvsamv1): Error calculating shadingfactor for subarray 0 at index 0
Simulation pvsamv1 failed :execfail(pvsamv1): Error calculating shading factor for subarray 0 at index 0
 
If I convert them to SAM CSV files, then they work fine. The weather file checker macro states the EPW file is fine. EPW file attached.
 
Note: Another user has raised this issue here: sam.nrel.gov/forum/forum-general/3095-exec-fail-pvsamv1-error-calculating-shading-factor-for-subarray-0-at-index-0.html#8531
 
Thanks very much.
 
Mark

Thanks, Mark.

We're investigating. You can track our progress on GitHub.com:

github.com/NREL/SAM/issues/365

Best regards,
Paul.

Hi Paul,

Thanks for looking at this matter.

The Github post states:  "a pvsamv1 error when usingsubhourly EPW weather files". Just so there is no confusion, the EPW issue was with hourlyfiles, I have not checked sub-hourly.

The other issue I raised was with SAM CSV sub-hourly weather files, causing the error: “Weather file hour range was not (0-23) or (1-24)”. SAM CSV hourly files worked  fine.
 
Neither error occurs with release 2, only release 3.
 
Regards Mark

Hi Mark,

This issue will be fixed in the Fall 2020 version of SAM.

Note that the time stamp Hour and Minute values in the SAM CSV format must be integers. As part of this fix, we have improved the error reporting to make that clearer.

Best regards,
Paul.