Issue with a dsv save

[KrateKIt]

Hi, I was playing Pokemon white 2 with one of my friends, he save the game and when he was going to edit the save in pkhex appears the message "Invalid save file loaded". We play in desmume, can someone help me with this issue? 

That's the save file

Pokemon Kaizo White 2 v1.05.dsv

[foohyfooh]

I know the saves I usually get with desmume are 512KB rather than the 1MB your own is so might make sense to see if there is a save type option which can give a compatible save.  One other thing could try would be to use File>Export Backup Memory which gives a .sav file and see if that is compatible with PKHeX.