A TimThumb error has occured

The following error(s) occured:

Could not open the lockfile for writing an image.

Query String : src=../images/urunler/Super-TCR-30-Induktif-Reaktif-Guc-Dengeleyici--3x10-Kvar-Trifaze-Sont-30-KVAR-resim-350316.png&w=500&h=500&zc=
TimThumb version : 2.8.14