Error-message when exporting library for Backup

[Oscar Gonzales]

calibre, version 3.26.1
FEHLER: Fehlgeschlagen: Exportieren der Daten fehlgeschlagen. "Details anzeigen" anklicken für weitere Informationen.

Traceback (most recent call last):
  File "site-packages\calibre\gui2\dialogs\exim.py", line 140, in run_action
  File "site-packages\calibre\utils\exim.py", line 195, in export
  File "site-packages\calibre\db\cache.py", line 63, in call_func_with_lock
  File "site-packages\calibre\db\cache.py", line 2199, in export_library
  File "site-packages\calibre\db\backend.py", line 1799, in backup_database
BusyError: BusyError: error

I´m using Windows 7 Ultimate SP1 64bit on a Desktop with a AMD Phenom II X4 955 Processor 3.2 GHz and 8GB RAM. Backup to Harddisk with 200GB free space. Size of Lybrary is 118Gb with 63747 books in several languages. I tried new Instalation, but got the same message.
Thanks

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased