ERROR: Unable to write file : DISK_ERR, leads to Out of Memory errors.

Failed real fast on v56 - was setting it up before I went out, and it failed before I got out the door (didn't have a chance to study the results yet, since I'm on my way out the door)

http://drazzy.com/espruino/v56failure.txt

var d;
var e;
var inits=new Uint8Array([0,0,0,0]);
var curdht=false;
var t=-1;
var rh=-1;
var t2=-1;
var rh2=-1;
var fs;
var havetraced=false;



function onInit() {
    digitalWrite(A14,1);
    digitalWrite(A13,1);
    setTimeout("doInit();",2000);
}

function doInit() {
    fs=require("fs");
    fs.appendFile("timetemp5.log","Espruino restarted")
    digitalWrite(A13,0);
    d=require("DHT11dev").connect(C10);
    d.read(function(a){ t=a.temp; rh=a.rh; inits[1]=1;endInit();});
    e=require("DHT22dev").connect(C11);
    setTimeout(function(){ e.read(function(a){ t2=a.temp; rh2=a.rh; inits[2]=1;endInit();});},2000);

}

function endInit() {
    if (inits[1]==1 && inits[2]==1 && inits [3]==0) 
    {
        inits[3]=1;
        digitalWrite(A14,0);
        setInterval(function() {var mf=process.memory().free;console.log(mf.toString()+" "+getTime().toFixed().toString()); if (mf < 1100) traceit();curdht=!curdht;if(curdht){doMeasure();}else{doMeasure2();}},5000);
        setInterval(function(){dologs();},30000);
        setBusyIndicator(A13);
    }
}

function traceit() {
    if (!havetraced) {
        havetraced=true;
        trace();
    }
}

function doMeasure() {
    d.read(function(a) {
        if (a.rh!=-1 && a.temp < 50) {
        	rh=a.rh;
        	t=a.temp;
        }
    });
}

function dologs() {
    console.log("trying to log...");
    fs.appendFile("timetemp5.log","DHT11,"+t.toString()+","+rh.toString()+",DHT22,"+t2.toString()+","+rh2.toString()+",Time,"+getTime().toFixed()+"\n");
}

function doMeasure2() {
    e.read(function(a) {
        if (a.rh!=-1 && a.temp < 50) {
            rh2=a.rh;
            t2=a.temp;
        } 
    });
}

save();