UE4.25 Unresolved external symbol in Creating Child class

[Jose_Alberto_Juarez]

I’m using Unreal engine 4.25. I have been able to follow all the other videos so far without any problems before. but this time:

after creating the child class if I compile, it work fine, but whatever I write after GENERATED_BODY()
causes when compiling:
“D:\Projects\CPPDev\ToonTanks\Binaries\Win64\UE4Editor-ToonTanks-1473.dll : fatal error LNK1120: 1 unresolved externals
PawnTank.gen.cpp.obj : error LNK2001: unresolved external symbol “public: __cdecl APawnTank::APawnTank(void)” (??0APawnTank@@QEAA@XZ)
PawnTank.cpp.obj : error LNK2019: unresolved external symbol “public: __cdecl APawnTank::APawnTank(void)” (??0APawnTank@@QEAA@XZ) referenced in function “public: static void __cdecl APawnTank::__DefaultConstructor(class FObjectInitializer const &)” (?__DefaultConstructor@APawnTank@@SAXAEBVFObjectInitializer@@@Z)”

here is the path to my git project so you can check it out:

vfxsnake/ToonTanks

right now in the github repository inside PawnTanck cpp is comment so you can construct the project, if you un-comment the line after the word “public:” will fail.

thanks in advance!!!
Alberto.

[Jose_Alberto_Juarez]

Never mind!! my bad, once I implemented the function the constructor in the .cpp file it works fine.

Thanks any way!!