WINCC V7.5 SP1: I have issues with picture windows in WINCC
My picture window becomes not visible every time...

The way I work:
I push a button, and then picturewindow should be visible.

The script of the button (event):
#define PIC_0 "Cyclus 1\\002_Pic0.pdl"
#define PIC_1 "Cyclus 1\\002_Pic1.Pdl"
SetVisible("Cyclus 1\\002_Pic0.pdl","Picture Window8",1); //Return-Type: BOOL
SetPictureName(PIC_0,"Picture Window8",PIC_1);

Sometimes it works, sometimes it doens't...