if I'm setting the ActionList1.Images-property to an Alphaimagelist then I get an “stream read error” and the editor list of the actionlist is hidden, if I remove the images-property I can see it.
I'm using Delphi XE7, AlphaControls 9.19 and Windows 8.1
At the time I'm setting the AlphaImagelist to the actionlist in the Formcreate-Event, but this is not possible for all times.
Upgraded to 9.20 today, problem still exists. In XE5 can't open “Action List editor” in designtime if TsAlphaImageList is assigned to ActionList.Images.
This issue is known and exists in last versions of Embarcadero Studios. Reason of the problem is not known still, something has been changed in the action list editor.
I'm researching it now, but have no idea how to fix it yet.
Temporary, you can define the “Images” property to Nil, before opening of action list editor.