c# - Photoshop Elements 自動化の内部エラー

Question

public static Photoshop.Application appRef = default(Photoshop.Application);  
appRef = new ApplicationClass();
appRef.Visible = false;
appRef.DisplayDialogs = PsDialogModes.psDisplayNoDialogs;

appRef.visible=false 行に内部エラーが表示される