Getting Importerror for a doctype?

Hi,
I am trying to make a tool for entering communications for Sales people. But I am getting an error as below:

Traceback (innermost last):
  File "/home/aditya/frappe-bench/apps/frappe/frappe/widgets/form/load.py", line 30, in getdoc
    doc = frappe.get_doc(doctype, name)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/__init__.py", line 352, in get_doc
    return frappe.model.document.get_doc(arg1, arg2)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/model/document.py", line 24, in get_doc
    controller = get_controller(doctype)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/model/document.py", line 43, in get_controller
    raise ImportError, doctype
 ImportError: Sales Call

Traceback (innermost last):
  File "/home/aditya/frappe-bench/apps/frappe/frappe/app.py", line 49, in application
    response = frappe.handler.handle()
  File "/home/aditya/frappe-bench/apps/frappe/frappe/handler.py", line 66, in handle
    execute_cmd(cmd)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/handler.py", line 89, in execute_cmd
    ret = frappe.call(method, **frappe.form_dict)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/__init__.py", line 531, in call
    return fn(*args, **newargs)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/widgets/form/load.py", line 30, in getdoc
    doc = frappe.get_doc(doctype, name)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/__init__.py", line 352, in get_doc
    return frappe.model.document.get_doc(arg1, arg2)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/model/document.py", line 24, in get_doc
    controller = get_controller(doctype)
  File "/home/aditya/frappe-bench/apps/frappe/frappe/model/document.py", line 43, in get_controller
    raise ImportError, doctype
 ImportError: Sales Call

The code in the sale_call.py is as below:

# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors and contributors
# For license information, please see license.txt

from __future__ import unicode_literals
import frappe
from frappe import _
from frappe.utils import flt
from frappe.model.document import Document
import json

class PaymentTool(Document):
	def make_communication(self):
		com = frappe.new_doc('Communication')
		com.subject = self.subject

Really hard to tell. Can you share your app link?

Here is the link to the github commit:

https://github.com/adityaduggal/rigpl-erpnext/commit/6763c8afa3591f049187619911bbba6dad98e5af