It's more that you can't commit multiple Force dice to multiple effects in the same action.

For instance, you can't commit a Force die to both the defense Control upgrade and offense Control upgrade for the Sense power in the same action, as they're two separate and distinct effects.

Now you could commit a Force die to Sense's offense Control upgrade and a Force die to the Intuitive Evasion talent (provided you've got Force Rating of 2 or higher) because they're an action and a maneuver respectively (the talent calls out it's a maneuver to commit the Force die, while the Force chapter notes that unless a power or upgrade says otherwise, committing a Force die is the same as activating the power and thus constitutes an action).

Also worth noting that for the most part, you can't commit a Force die to the same effect to increase what it does; for instance you can't commit 2 Force dice to Sense's defense Control upgrade and have the effects stack. Generally if an upgrade that permits committing a Force die has the line "may not activate this multiple times" at the end of the full description, then you only get to commit however Force dice are listed at the start of the upgrade's description. Enhance is notable for not having that text, so you could commit 3 Force dice (with FR 3) to increase your Brawn by 3, but it'd have to be committing all three dice at once in the same action, not 1 die each separate round.

Can you try and reference as to where it says that you can't activate to different effects under the same tree?

Under that same term does that mean that you can't commit to increase your agility and your brawn at the same action under the Enhance tree?

Can you try and reference as to where it says that you can't activate to different effects under the same tree?

Under that same term does that mean that you can't commit to increase your agility and your brawn at the same action under the Enhance tree?

correct. With enhance you have to choose a singe upgrade to use that turn as your action to commit dice. Enhance is the unique one in that in a single action you may commit multiple dice to the same Characteristic, you just cant commit dice to different characteristics at the same time. there are a number of elements here that are important to this situation.

FaD p281 Activating Basic Powers and Upgrades of a Force Power Multiple Times:

basically says that unless stated otherwise any effect can be activated multiple times during a single action. It has been clarified (ill look for the source) that this includes the committing of force dice.

FaD p281-282 Committing Force Dice:

2nd paragraph; "To activate and fuel an 'ongoing effect', the Force sensitive character commits a number of Force dice." ie Its a commit action to activate 1 ongoing effect.

the very last sentence of this section states that multiple "copies" of a commit can not be benefited from at the same time, ie you cant choose to commit 1 dice to increase Agility this turn, then another dice next turn.

FaD p289 Enhance Control Upgrades for Committing dice:

Neither the Brawn or Agility upgrade have text to state that they can not be activated multiple times.

FaD p305 Sense Control Upgrades for Committing Dice:

Both the Defence and Offence options include text saying "The User may not activate this multiple times."

So some commit talents and Force Powers can allow multiple dice to be committed in a single action, others limit the number of dice you can commit. Some can be activated as part of a force power check, called Duration upgrades. Multiple different ongoing effects can not be activated in a single action.

ok, thank you