Hi -

I'd like to figure this one out but I haven't been able to reproduce it - you say this always happens? I spent quite a while editing but didn't run into this situation so I wonder if there's something specific going on that I'm not reproducing here.

Also, when it happens can you check the error log and the python console and attach any information that shows up there?

-Steve

Here's an error log excerpt (Nicola):
It happened again while I was using the draw option in editor. Here is the description from the Error log:

invalid command name "vtkImageData0x120643f70"
invalid command name "vtkImageData0x120643f70"
while executing
"$disposeCheckPoint(imageData) Delete"
(procedure "EditorStoreCheckPointVolume" line 13)
invoked from within
"EditorStoreCheckPointVolume [$node GetID] previousCheckPointImages"
(procedure "EditorStoreCheckPoint" line 11)
invoked from within
"EditorStoreCheckPoint $_layers(label,node)"
(object "::EffectSWidget::drawEffect6" method "::Labeler::applyImageMask" body line 11)
invoked from within
"$this applyImageMask $maskIJKToRAS $mask $bounds"
(object "::EffectSWidget::drawEffect6" method "::Labeler::applyPolyMask" body line 17)
invoked from within
"$this applyPolyMask $o(polyData)"
(object "::EffectSWidget::drawEffect6" method "::DrawEffect::apply" body line 21)
invoked from within
"$this apply"
("Return" arm line 2)
invoked from within
"switch [$_interactor GetKeySym] {
"Return" -
"a" {
$this apply
set _actionState ""
}
..."
("KeyPressEvent" arm line 6)
invoked from within
"switch $event {
"LeftButtonPressEvent" {
set _actionState "drawing"
$o(cursorActor) VisibilityOff
$sliceGUI SetGrabID $t..."
(object "::EffectSWidget::drawEffect6" method "::DrawEffect::processEvent" body line 25)
invoked from within
"::EffectSWidget::drawEffect6 processEvent sliceGUIRed KeyPressEvent"
("eval" body line 1)
invoked from within
"eval $instance $args"
(procedure "::SWidget::ProtectedCallback" line 22)
invoked from within
"::SWidget::ProtectedCallback ::EffectSWidget::drawEffect6 processEvent sliceGUIRed KeyPressEvent"

This workaround should prevent the symptom. Not sure yet of the underlying cause.

pieper@flint:~/slicer4/latest/Slicer4$ svn commit -m "BUG: check for reported error condition (bug 1667) where image data is deleted but still in data structure" ./Base/GUI/Tcl/EditorGUI.tcl
Sending Base/GUI/Tcl/EditorGUI.tcl
Transmitting file data .
Committed revision 19146.