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This bug is occurring on only one Form, and doesn't happen on any other Forms in the project (i.e. i can't reproduce this bug). I don't know what caused the bug, but it started after I had been designing this Form for a while. The IDE stopped updating the generated source code at a seemingly arbitrary point in design. I may have to start the form again and lose hours of work. Variable declarations and names update correctly in the design and source editors and in the .Form file, but many components are not initialized in the generated initComponents() method. Attempting to add an event to a component simply jumps to the source editor without actually creating an new code. The event does not appear in the .Form file either. Attempting to copy and paste a certain panel (which is the only one that doesn't display correctly in the design editor, but did at one time) to a new form will create variables but the inspector does not show the components and they do not display in the design editor. Some properties of some components are locked, such as Horizontal Resizeable. Attempting to move a component meets with either no change or locks NetBeans into 100% CPU usage while not responding to commands, but the Windows Task Manager says NetBeans is still responding. At one point the form displayed all components correctly, but all this started after a save and reload (between which the souce code was not modified). Its as though NetBeans can no longer update code in the initComponents generation area or perhaps something happened to the .Form file, however I don't see anything obviously wrong with it.
Created attachment 30566 [details] Note the use of jPanel1 in initComponents() instead of subnetMaskPanel
Created attachment 30567 [details] Screen shot showing navigator and design form editor, note vdtSettingsPanel cannot be resized
Created attachment 30568 [details] .Form file generated by IDE
Reassigning to "form" for evaluation.
The attached form is broken, not sure what caused it (sorry). jLabel12 component is wrongly referenced in the layout definition part of the form file. I think the problems you see are caused by this error. The problem is that the error is not detected. Could you try to do a simple search/replace in the .form file (open it in some external editor and replace id="null" with id="jLabel12" )? After doing this change, do the problems disappear? I've already integrated a fix that should detect errors like this already when opening the form.
That fixed the problem alright. Everything looks and acts the way it was intended to. You've got a sharp eye, thanks.
I don't know if this is related but in the generated source code jPanel1 was used instead of subnetMaskPanel which caused a cannot find symbol compiler error, but using the navigator to change subnetMaskPanel's variable name to jPanel1 and then back to subnetMaskPanel resolved the problem. This was after I said everything was working again, but closing NetBeans and loading again did not fix the subnetMaskPanel misnomer issue.