Node Js and Ebay api

I am novice to NodeJs and working with ebay-api.
I found this great example at GitHub

one strange issue is when I run the js file via CMD. it is working but sometimes it shows error and then I cleared cache it works and sometimes after clearing the cache it shows error. But the code is exactly the same which I got output correctly. Did anyone face the same issue or any idea where might be the problem?

var ebay = require('../index.js');

var params = {
keywords: ["Canon", "Powershot"],

// add additional fields
outputSelector: ['AspectHistogram'],

paginationInput: {
entriesPerPage: 10
},

itemFilter: [
{name: 'FreeShippingOnly', value: true},
{name: 'MaxPrice', value: '150'}
],

domainFilter: [
{name: 'domainName', value: 'Digital_Cameras'}
]
};

ebay.xmlRequest({
serviceName: 'Finding',
opType: 'findItemsByKeywords',
appId: '<your app id>', // FILL IN YOUR OWN APP KEY
params: params,
parser: ebay.parseResponseJson // (default)
},

// gets all the items together in a merged array

function itemsCallback(error, itemsResponse) {
if (error) throw error;

var items = itemsResponse.searchResult.item;

console.log('Found', items.length, 'items');

for (var i = 0; i < items.length; i++) {
console.log('- ' + items[i].title);
console.log('- ' + items[i].galleryURL);
console.log('- ' + items[i].viewItemURL);
} 
}
);

I’m getting the following errors:

C:node_modulesebay-apiexamples> node H:NodeJsapp.js //Run via NodeJS CMD

H:NodeJsapp.js:36
if (error) throw error;
^
Error
at Request._callback (C:Usersshiva rajunode_modulesebay-apilibxml-request.js:151:23)
at Request.self.callback (C:Usersshiva rajunode_modulesebay-apinode_modulesrequestrequest.js:200:22)
at emitTwo (events.js:106:13)
at Request.emit (events.js:194:7)
at Request. (C:Usersshiva rajunode_modulesebay-apinode_modulesrequestrequest.js:1067:10)
at emitOne (events.js:101:20)
at Request.emit (events.js:191:7)
at IncomingMessage. (C:Usersshiva rajunode_modulesebay-apinode_modulesrequestrequest.js:988:12)
at emitNone (events.js:91:20)
at IncomingMessage.emit (events.js:188:7)

Your suggestions would be appreciated. Thanks