Hiding Skills - Yanfly plugin

[Sarah_yt]

Hi guys,

I'm trying to set up a skill tree system where you start with a base skill, with several chances to upgrade as the game progresses. Each time you upgrade, you get two choices on how to upgrade it but choosing one will block off the other path.

E.g.
Skill 20 = base
Skill 21 = 1st upgrade available choice(a)
Skill 22 = 1st upgrade available choice(b)
...

Learning skill 20 will cause that to disappear from the list, making skills 21 and 22 appear as choices (already got that bit down pat). But when I go to choose either 21 or 22, the other doesn't disappear.

I'm using Yanfly's Skill Learn plug in and have read similar posts, but I can't figure it out. Here's the code I've been using:
<Learn Show Eval>
if(!this._actor.isLearnedSkill(20) || this._actor.isLearnedSkill(21) || this._actor.isLearnedSkill(22) { value = false; }
else value = true;
</Learn Show Eval>

And here's the error that pops up.

Spoiler: screenshot

EDIT: Whoops, forgot to ask - I think it could be fixed by including a check in Skill 21 to see if the actor has not learned skill 22 (and visa versa) but I don't know how to get the program to run that check.

Many thanks for your help!

 

[Shaz]

There's a missing ) after checking for skill 22. That's why it's telling you the { is unexpected - you haven't finished the condition yet.

I see you have some different versions of the formula showing up there. All of those need an extra ) after skill 22. Some of them have 2 and need 3, some of them have 1 and need 2.

 

[Sarah_yt]

XD Thank you so much! I added the ) and it works perfectly gotta love a second pair of eyes.

EDIT: It solved the issue of appearing in the 'Learn Skill' section, but it didn't hide it from the battle or skill menu screen.

I've gone back to experimenting with Yanfly's basic Skill Core plugin, but the 'Hide if Learned Skill: ...' note never seems to work. Here's a picture:

Spoiler: picture

PS: I changed the title of the thread to better reflect the issue I was having. Sorry if this caused any confusion.

 

[Sarah_yt]

I think I figured it out - the issue was with <Hide if Learned Skill: x to y>. If I just used <Hide if Learned Skill: x>, it works perfectly - even with the <Learn Show Eval> note tag too. Woot!

Thanks again for your help Shaz!

If anyone is interested in seeing more, I can upload some screenshots demonstrating what I mean.