Why "keil" does not able to read "source input files" ?

[Ahmed]

I want to make a program for wireless accelerometer with a microcontroller "nrf51822". I prepared the code however I face a problem with the ".h" files such as "nrf_error.h" as the program is not able to get them. I checked the paths however I still have these problems.

Thanks in advance!

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[bjorn-spockeli]

You have to add the include paths of the headers that you are using under "Options for Target"-->C/C++ --> Include Paths. See the screenshot below.