Problem about Practive rune
 

I‘m an level 16 enchant ,When I try to upgrade my research skill ,I found practive rune not work at Green,my research value is 16,INT 116，as usually practive rune should train research to 25,But I combine more than 20 practive rune and nothing happened ，my research skill still stay 16

Working as intended:

https://wiki.project1999.com/Skill_Research

What is the skill cap?

Research is a level restricted skill. As such, your max skill is: (Level - 15) x 5. When you train Research at level 16, it starts your skill at Skill 16, far above the maximum possible by this formula. As such you cannot increase your skill any higher until level 19. The maximum skill is 200. (Edit: Not necessarily true. My level 16 wizard on 21st of June, 2018 has the research skill at 5 after training it at the trainer. Which is correctly reflected from the formula. 16-15=1 x5 = 5.)

-Mcoy

Thanks ,I did not notice its a level restricted skill ,cry