Adding a new library in a Keil project

[Francesca]

Hi!I'm having some problems in adding a new library to my project (sdk 11.0.0,s130), I want to add ble_nus.h. I follow this instructions "devzone.nordicsemi.com/.../" but it still doesn't work. someone can help me, please?thank you!

[Francesca]

*** Using Compiler 'V5.06 update 1 (build 61)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Build target 'nrf51422_xxac_s130' compiling ble_nus.c... compiling main.c... ......\main.c(41): error: #5: cannot open source input file "ble_nus.h": No such file or directory #include "ble_nus.h" ......\main.c: 0 warnings, 1 error "._build\nrf51422_xxac_s130.axf" - 1 Error(s), 0 Warning(s). Target not created. Build Time Elapsed: 00:00:03

This the error, I have also updated the screenshot