I have encountered a big issue when using this plugin (Link to it: http://yanfly.moe/2016/04/15/yep-92-attachable-augments-rpg-maker-mv/). Most of things worked well until i touched these two note tags "Param: +x%" and "Param: -x%" when setting up the augment items. I'm going in detail for this: First, i have a sword which only grants the user +5 ATK and a Reinforcement Gem (Augment) which can be attached to the sword to grant +50% HIT. Below is the note tags i use for my Gem: Spoiler And here is my character's status without Gem attached to the sword (HIT is still 95% and there is no gems attached into the sword): Spoiler Spoiler So here i attach my Gem to my sword to see if my character gains the effect or not, and it works well (raises HIT from 95% to 145%, also add prefix "Precise" to the sword) Spoiler Spoiler However, the problem starts from here. As you can see above, i do add note tag to decrease 50% HIT (HIT: -50%) when this gem is detached from the equipment, also delete the prefix "Precise" (Cancel Prefix: Precise). Upon detaching, the prefix disappears as intended, but my character's HIT is still 145%. This means the 50% bonus HIT still remains in the equipment without Gem. It seems that the "HIT: +50%" is stuck on the attached equipment. Detaching gem from it does not remove its affection on my character. Only unequipping the equipment can solve the problem. This problem does not occur when using note tag "Param: +x" (without %). But this note tag cannot add Ex-Params and Sp-Params. So i guess the "Param: +x%" has a problem (even with params like ATK, DEF, etc). I did try in a fresh project, with only YEP Core Engine, Item Core, Status Menu Core & this Attachable Augments, the problem still occured. So i'm wondering if it is a bug caused by the plugin, or am i doing something wrong? I will be very grateful if you can help me about this. Edit: Another member also encountered this problem and reported to Yanfly via THIS thread. I'm sure this is truly a bug.