Hi Chris,
Thanx for your help !
Indeed, the problem arises when there is no geometry. The plugin I'm writing gives feedback on the scale-factor that an object is scaled with. When you press the scale-up button the object is scaled up with a factor. Then the scale-factor is presented to the user as a screen-note. The user can scale up as much as he wants to, and the screen-note will refresh accordingly.
Then, when the 'scale-down at once button' is pressed, the object is scaled down to its original proportions and the screen-note gets deleted.
But there arises a problem with a scaled up object and the corresponding screennote. In case the object is deleted ,so there is no geometry, the screen-note is still active. And I can find no way to correct this.
Thnx,
Liquid