Process and Compilation error (Boolean/boolean)

[grappyzxc]

Dear all,

I am new to jBPMN and saw 3 video tutorial on youtube from Maciej Swiderski.

These are the links:

https://www.youtube.com/watch?v=TM9cuL_Mfnk

https://www.youtube.com/watch?v=VebltONoB5g

https://www.youtube.com/watch?v=D8EMUgBqSHQ

Even though i followed every steps as shown in the video. I encountered this error as shown in the picture below.

I have tried changing adult type from Boolean to boolean. However it shows me another error which is this.

Thank you.