IAR linker Error[Li005] after copying from one example to another

Question

Hello, 
 I tried copying code from twi_sensor example to ble_app_uart and got this error: 
 Error[Li005]: no definition for "nrf_drv_twi_init" [referenced from W:\MODIFIED_SDK_13.0.0_04a0bfd\examples\ble_peripheral\flipdot_fw301\pca10040\s132\iar\_build\main.o] 
 
 What's weird in this case is that all the includes necessary for function nrf_drv_twi_init have been added to main.c and if I tried Go To Definition of nrf_drv_twi_init (which seems to be located in nrf_drv_twi.h) I would find it without any problems. 
 Link to the project: github.com/.../flipdot_fw301

Sigurd · Accepted Answer

Hi, 
 Seems like you have not added the file nrf_drv_twi.c to your project. 
 Right click on the folder nRF_Drivers -> Add -> Add Files..., and add nrf_drv_twi.c . That should solve the problem.