BLE Nano using Arduino Ide issue -

hi i'm trying load sample blink application on ble nano device using arduino ide. starts compiling crashes

processing.app.debug.runnerexception     @ processing.app.debug.compiler.compilehex(compiler.java:793)     @ processing.app.debug.compiler.compile(compiler.java:148)     @ processing.app.sketch.build(sketch.java:1589)     @ processing.app.sketch.exportapplet(sketch.java:1611)     @ processing.app.sketch.exportapplet(sketch.java:1597)     @ processing.app.editor$defaultexporthandler.run(editor.java:2397)     @ java.lang.thread.run(unknown source) caused by: java.lang.nullpointerexception     @ processing.app.helpers.stringreplacer.replacefrommapping(stringreplacer.java:97)     @ processing.app.helpers.stringreplacer.replacefrommapping(stringreplacer.java:89)     @ processing.app.helpers.stringreplacer.formatandsplit(stringreplacer.java:37)     @ processing.app.debug.compiler.compilehex(compiler.java:791)     ... 6 more`enter code here` 

so question is. reason of crash. , how fix it?

update: i've used http://redbearlab.com/getting-started-nrf51822/ configure connection. here sample code:

void setup() {   // initialize digital pin 13 output.   pinmode(13, output); }  // loop function runs on , on again forever void loop() {   digitalwrite(13, high);   // turn led on (high voltage level)   delay(1000);              // wait second   digitalwrite(13, low);    // turn led off making voltage low   delay(1000);              // wait second } 

can please post sample code it's importing? also, can see board in ports comm#? have inkling installation process of ide might not have occurred correctly, cause components/libraries missing. can potentially cause problems you're describing, if you're sure board connected correctly , you're doing importing sample code.