nlapiSubmRecord for Item Fulfillment fails with "Unexpected Error"

Hi,

After an Item Fulfillment is submitted, I am reloading it, fixing some stuff, and resubmitting it.  But the nlapiSubmitRecord fails with an Unexpected Error.

Very similar code works great on a Item Receipt but fails on Fulfillment.

 function update_out_tracker(type)  {   var debuglevel = "ion";   var currentRecord;   var num_lines;   var i ;     if( (type == 'create') || (type=='edit') )   {      currentRecord_id = nlapiGetRecordId();    currentRecord = nlapiLoadRecord('itemfulfillment', currentRecord_id);      // Get the number of line items    num_lines = currentRecord.getLineItemCount('item');      for ( i = 1 ; i<= num_lines ; i++ )    {       chk_receive =  currentRecord.getLineItemValue('item', 'itemreceive', i);     debug_output('Audit', 'chk_receive', chk_receive, "on");       if (chk_receive == "T")     {        item_id = currentRecord.getLineItemValue('item', 'item', i );        sns = currentRecord.getLineItemValue('item', 'custcol1', i );        sns = escape(sns);      sns = sns.replace(/rnrn/g,"rnshanon");      sns = sns.replace(/%0A%0A/g,"%0A");      sns = sns.replace(/%0A%0A/g,"%0A");      sns = sns.replace(/%0A%0A/g,"%0A");      sn_counter = sns.split("%0A");        qty = currentRecord.getLineItemValue('item', 'quantity',