when i deactivate "Bob's Revamp mod" i can research the rocket tech. the rocket fluel still uses the two "new" sub-components. after researching the rocket tech, putting the Revamp mod back in i get the research for the "heat shields" and the "low density structure...

i have a problem with the rocket tech.
i have researched all other techs, but i can't research the rocket tech.
it seems to be a problem with the "Bob's Revamp mod" pack.
i'm using the ABPlus modpack, up-to-date.

Thanks for help.