Change in treatment of missing water vapor data for spectral correction?

[LauraH]

Hi,

I recently noticed an odd difference between two PVsyst (v. 8 ) runs of the same model that used different resource data, as illustrated below.  Both reports indicated that spectral correction had been applied, but only one mentioned the source of water vapor information.  The waterfall diagram shows a spectral gain of 0.3% in the first case, but 0% in the second (there's no reference to spectral gain/loss in the diagram).  How is this possible if spectral gain was applied both times?  I'm suspicious that water vapor/RH wasn't included in the resource data upload in the second run, but wouldn't PVsyst throw an error in that case?  At least it did in v. 7.

Thanks!

Edited yesterday at 05:20 PM by LauraH
Added supporting images

[LauraH]

Shoot, I started a new topic (Report shows spectral correction applied even when it isn't) when following up on this project.