In Office Complex the guard wont open the door, same with the scientist later on.

http://imgur.com/a/zSRIo

Usual Problem is, that you (quick)load a save that you have saved in the area where the npc abuse should be taking place. If you fail it and attempt to do it again, you need to reload an area, that is before loading into the area of the npc abuse. Different areas are seperated by loadings.

Greetings qd

I'll try it out, thanks for the quick reply

yep, that was it. thanks a lot

Also Barney is a fucl