I've faced a similar problem when using PVsyst 6.37
I have to identical pan files but they originate from different sources. In PVsyst, it says that muVoc for both of them should be, as expected, identical. However, when I "copy to table" and export the pan file details into a spreadsheet, the mu.Voc values are different. I attach the an image of the pan file details spreadsheet and PVsyst screenshots for reference.
File comment: spreadsheet and screenshots
muvoc pvsyst.JPG [ 220.59 KiB | Viewed 7635 times ]
Did either of you find out the reason for this? I'd be curious to know