Error connecting Custom DLL to STM32F302R8 GPIO or PWM

I created a custom DLL to be used in Altair Embed 2021.1. The user block works fine if it runs alone. But when I try to download it to STM32F302R8, I get  an error:

" C:\Altair\Embed2021\cg/Diagram1_21.c:41: undefined reference to `cgMain'

c:/program files (x86)/gnu arm embedded toolchain/10 2021.10/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin/ld.exe: Diagram1_21.o: in function `main':

C:\Altair\Embed2021\cg/Diagram1_21.c:77: undefined reference to `cgMainSS' c:/program files (x86)/gnu arm embedded toolchain/10 2021.10/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin/ld.exe:

C:\Altair\Embed2021\cg/Diagram1_21.c:80: undefined reference to `cgMainSE' collect2.exe: error: ld returned 1 exit status".

I have attached a screenshot of the message. Any help?