Problem with tech tree

[Shiva]

I get up to level 6 on the tech tree and want to get Advanced Electronics. I have plenty of science and Electronics in Level 5 is activated. I get the message "can not research Technologies over 100 science at this level."

This was no problem in Kerbal 190, but has the tech tree changed for 112? Do I have to active all the tech in level 5 before I can get a tech on level 6? I have no mods installed

[jimmymcgoochie]

You probably need to upgrade R&D.

[peridoot]

unless its science mode you nooed to be using a lvl2 or 3 RnD to research teir 6 or above

[Dr. Kerbal]

This is true.