hello, I'd like to reduce the chance of success only on characters.

I believe the line
<denounce_character_attemp_modifier float="0.5"/>
in the descr_campaign_db.xml, is what should do it. But whatever I do, nothing change. I tried to increase this value, to lower it, to make it negative, but nothing change.
Also <denounce_heretic_attemp_modifier float="1.5"/> looks broken

The min and max chance of success
<denounce_chance_min int="5"/>
<denounce_chance_max int="95"/>
work as expected.

Something else, what these lines are supposed to do?
<inquisitor_crt_heresy_divisor float="1.0"/>
<inquisitor_crt_pfp_modifier float="0.5"/>
<inquisitor_crt_pfp_modifier_min float="0.0"/>
<inquisitor_crt_pfp_modifier_max float="1.0"/>
<inquisitor_crt_chance_min float="0.0"/>
<inquisitor_crt_chance_max float="0.1"/>
<inquisitor_target_leaders bool="false"/>
<inquisitor_target_heirs bool="false"/>
I believe the last 2 make faction leader and heir not denouncable, but they are.