Module import failed installing custom app with custom doctype fixtures

Hi there,

i’m getting module import failed while installing / updating custom app which contain custom doctype as fixtures; error is:

$ bench update
INFO:bench.utils:updating bench
Already up-to-date.
Requirement already satisfied (use --upgrade to upgrade): Pillow in ./env/lib/python2.7/site-packages
INFO:bench.app:pulling frappe
From https://github.com/frappe/frappe
 * branch            develop    -> FETCH_HEAD
Already up-to-date.
INFO:bench.app:pulling erpnext
From https://github.com/frappe/erpnext
 * branch            develop    -> FETCH_HEAD
Already up-to-date.
INFO:bench.app:pulling myapp
From https://bitbucket.org/mycompany/myapp
 * branch            master     -> FETCH_HEAD
Already up-to-date.
Requirement already up-to-date: pip in ./env/lib/python2.7/site-packages
Migrating is.dev
Updating frappe                     : [========================================]
Updating erpnext                    : [========================================]

-- error!?!

Module import failed for Warehouse Supplier (frappe.core.doctype.warehouse_supplier.warehouse_supplier)
Module import failed for Item Barcode (frappe.core.doctype.item_barcode.item_barcode)
Module import failed for Item Category (frappe.core.doctype.item_category.item_category)
Module import failed for Item Cash Ward (frappe.core.doctype.item_cash_ward.item_cash_ward)
Module import failed for Stock Entry Causal (frappe.core.doctype.stock_entry_causal.stock_entry_causal)
Module import failed for Item Season (frappe.core.doctype.item_season.item_season)

----

Syncing help database...
Invalid Jinja Template for ../apps/frappe/frappe/docs/user/pt/tutorial/before.md. Skipping
Wrote ./assets/js/print_format_v3.min.js - 18k
Wrote ./assets/js/frappe-web.min.js - 132k

Wrote ./assets/myapp/js/myapp.min.js - 0k <-- custom js correctly imported

Wrote ./assets/js/form.min.js - 138k
Wrote ./assets/js/report.min.js - 158k
Wrote ./assets/js/erpnext.min.js - 82k
Wrote ./assets/css/list.min.css - 6k
Wrote ./assets/js/item-dashboard.min.js - 6k
Wrote ./assets/js/d3.min.js - 343k
Wrote ./assets/css/report.min.css - 8k
Wrote ./assets/css/frappe-web.css - 54k
Wrote ./assets/js/list.min.js - 106k
Wrote ./assets/js/dialog.min.js - 62k
Wrote ./assets/js/desk.min.js - 247k
Wrote ./assets/css/form.min.css - 4k
Wrote ./assets/js/editor.min.js - 26k
Wrote ./assets/css/erpnext.css - 3k
Wrote ./assets/js/libs.min.js - 886k
Wrote ./assets/js/erpnext-web.min.js - 2k
Wrote ./assets/css/desk.min.css - 265k
Wrote ./assets/css/module.min.css - 2k

All the custom doctypes are in ERPNext Stock module and all of them are child tables as well.

Actually they are working fine once installed, but not sure what this error stands for …any hint?