Traceback (most recent call last):
  File "electrum\gui\qt\send_tab.py", line 525, in do_save_invoice
  File "electrum\gui\qt\send_tab.py", line 531, in save_pending_invoice
  File "electrum\wallet.py", line 1105, in save_invoice
  File "electrum\wallet.py", line 397, in save_db
  File "electrum\wallet_db.py", line 1635, in write
  File "electrum\util.py", line 470, in do_profile
  File "electrum\wallet_db.py", line 1645, in _write
  File "electrum\storage.py", line 86, in write
OSError: [Errno 28] No space left on device