Creating Quote from Project Record Script

I'm trying to create a quote via a script from a project record.  The project record contains all the information I need to create the quote, but for some reason when I use a client side script to create the quote - I get the following error message:

An unexpected error occurred in a script running on this page.

createChangeOrderButton (button)
customscript_g5_cs_project

INVALID_CUSTOMER_RCRD
This customer record -1 is not valid. Please create the customer first.

I've created a client side button with the following code:

function createChangeOrderButton(){   var projectId = nlapiGetRecordId();   var customer = nlapiGetFieldValue('parent');      //create quote   var recQuote = nlapiCreateRecord('estimate');   var recQuoteId = recQuote.getId();      nlapiSetFieldValue('custbody_reseller',3415);   nlapiSetFieldValue('custbody_distributor',3414);   nlapiSetFieldValue('custbody_end_user',13814);   nlapiSetFieldText('custbody_order_type','Contract - New');   nlapiSetFieldValue('custbody_bill_to_tier',1);   nlapiSetFieldValue('custbody_ship_to_tier',1);   nlapiSetFieldText('probability','60%');   nlapiSetFieldValue('entity',3415);      recQuote.selectNewLineItem('item');   recQuote.setCurrentLineItemValue('item', 'item', 24);   recQuote.setCurrentLineItemValue('item', 'project', projectId);   recQuote.commitLineItem('item');       var reqQuoteId = nlapiSubmitRecord(recQuote, false, true);   var quoteURL = nlapiResolveURL('RECORD', 'estimate', recQuoteId, true);   window.open(quoteURL, '_blank');  }