extensions.cmake fatal error

[Wayne_Dow]

I am attempting to compile the nrf sample code for peripheral uart and I encounter a fatal error in the extensions.cmake file. Apparently the CACHE_VAR_REQUIRED is set somewhere but the variable is not, line 3335 of the extensions.cmake file, i.e. 

if(${CACHE_VAR_REQUIRED} AND NOT DEFINED ${variable})

I don't know if this requires a statement such CONFIG_CACHE_xxx?

[Priyanka]

HI Wayne,

Are you trying this sample for the nRF52840DK? Also, which SDK version are you working on?

Regards,

Priyanka