Omron HMI - how to upload and decompile several screens on the same hub

I'm trying to upload and decompile 2 screens on the same Ethernet hub. After I successfully uploaded and saved both .pkg files, I selected them in the decompile window and set the path for the .nbp file I got an error message "PKG file is not generated by the same project and same compile, unable to decompile.

Could someone give me a hint what I'm doing wrong? Thanks.

Have never seen that before but I normally do all that stuff via USB and save separate files - works fine.

Do you mean that you use a USB stick to save the .pkg files at each HMI (that were "built" in one project) and then you follow the same procedure as I described? (select them in that decompile window, set the path and hit the decompile button...). I'll try it on Monday. But it would be more efficient if I could do it online.