Hi again, I thought maybe there is an issue with retina screens.
If I open Ruby console:
Viewport size: 2880x1468 pixels

Sketchup.active_model.bounds.min.z
~ -3,77m

Sketchup.active_model.bounds.max.z
~ 30,09m

Hello, I'm having troubles with the plugin.
Installation seems OK as I'm able to launch it (after having selected a Top View and unchecked Perspective).
I have the height map option window and when I click OK it crashes (I've tried default setup and other setup it's the same).

I'm using MacOSX Sierra and Sketchup 2015 (version 15.3.329).

Any help would be nice but this thread is quite old so...

Note: my geo area is not square (hope that's not the issue).

Full stack:

Exception Name: NSInternalInconsistencyException
Description: Invalid parameter not satisfying: value != nil
User Info: {
NSStackTraceKey = "0x7fffa0b35b7b 0x7fffb38becad 0x7fff9f1eb232 0x7fffa0c1e390 0x7fff9d492c56 0x10d6fae3b 0x10d7d9cab 0x1133b03f2 0x11339b149 0x1133a729f 0x1133a669b 0x1133a65e0 0x113285d82 0x1133ad9b1 0x1133ace94 0x10d7f03b8 0x11327fc54 0x10d7f022d 0x10d7c8d06 0x10da447ab 0x7fffb43ce03d 0x7fff9d5064e7 0x7fff9d044de2 0x7fff9d044b4e 0x7fffb43ce03d 0x7fff9d0cdb99 0x7fff9d0cdb10 0x7fff9d0cd93d 0x7fff9cf842ac 0x7fff9e6d60d5 0x7fff9e6d5346 0x7fff9e6eadc4 0x7fff9e736c96 0x7fff9e7622bb 0x7fff9e76226a 0x7fff9e76213d 0x7fff9e762b77 0x7fff9e762826 0x7fff9cf74079 0x7fff9d1ee322 0x7fff9d5044eb 0x7fff9cde8fbd 0x7fff9cdb3a8a 0x10d622874 0x1";
}

0 CoreFoundation 0x00007fff9f1e652b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fffb38becad objc_exception_throw + 48
2 CoreFoundation 0x00007fff9f1eb232 +[NSException raise:format:arguments:] + 98
3 Foundation 0x00007fffa0c1e390 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 195
4 AppKit 0x00007fff9d492c56 -[NSSavePanel setNameFieldStringValue:] + 146
5 SketchUp 0x000000010d6fae3b ZN14RubyUIUtilsMac13ShowSavePanelERKN6atlast5utils14atlast_ustringES4_S4_PS2 + 269
6 SketchUp 0x000000010d7d9cab _Z16InitRubyUIModulev + 7676
7 Ruby 0x00000001133b03f2 vm_call_cfunc + 1074
8 Ruby 0x000000011339b149 vm_exec_core + 13289
9 Ruby 0x00000001133a729f vm_exec + 127
10 Ruby 0x00000001133a669b vm_invoke_proc + 171
11 Ruby 0x00000001133a65e0 rb_vm_invoke_proc + 32
12 Ruby 0x0000000113285d82 proc_call + 114
13 Ruby 0x00000001133ad9b1 vm_call0_body + 2017
14 Ruby 0x00000001133ace94 rb_call0 + 404
15 SketchUp 0x000000010d7f03b8 _Z15protect_funcallmmiz + 786
16 Ruby 0x000000011327fc54 rb_protect + 212
17 SketchUp 0x000000010d7f022d _Z15protect_funcallmmiz + 391
18 SketchUp 0x000000010d7c8d06 _ZNK12CRubyCommand6InvokeEv + 94
19 SketchUp 0x000000010da447ab _ZN8CCommand13InvokeCommandEi + 39
20 libsystem_trace.dylib 0x00007fffb43ce03d _os_activity_initiate + 61
21 AppKit 0x00007fff9d5064e7 -[NSApplication(NSResponder) sendAction:to:from:] + 456
22 AppKit 0x00007fff9d044de2 -[NSMenuItem _corePerformAction] + 324
23 AppKit 0x00007fff9d044b4e -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 114
24 libsystem_trace.dylib 0x00007fffb43ce03d _os_activity_initiate + 61
25 AppKit 0x00007fff9d0cdb99 -[NSMenu performActionForItemAtIndex:] + 121
26 AppKit 0x00007fff9d0cdb10 -[NSMenu _internalPerformActionForItemAtIndex:] + 94
27 AppKit 0x00007fff9d0cd93d -[NSCarbonMenuImpl _carbonCommandProcessEvent:handlerCallRef:] + 107
28 AppKit 0x00007fff9cf842ac NSSLMMenuEventHandler + 986
29 HIToolbox 0x00007fff9e6d60d5 _ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec + 1708
30 HIToolbox 0x00007fff9e6d5346 _ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec + 428
31 HIToolbox 0x00007fff9e6eadc4 SendEventToEventTarget + 40
32 HIToolbox 0x00007fff9e736c96 _ZL18SendHICommandEventjPK9HICommandjjhPKvP20OpaqueEventTargetRefS5_PP14OpaqueEventRef + 411
33 HIToolbox 0x00007fff9e7622bb SendMenuCommandWithContextAndModifiers + 59
34 HIToolbox 0x00007fff9e76226a SendMenuItemSelectedEvent + 188
35 HIToolbox 0x00007fff9e76213d ZL19FinishMenuSelectionP13SelectionDataP10MenuResultS2 + 96
36 HIToolbox 0x00007fff9e762b77 _ZL14MenuSelectCoreP8MenuData5PointdjPP13OpaqueMenuRefPt + 702
37 HIToolbox 0x00007fff9e762826 _HandleMenuSelection2 + 460
38 AppKit 0x00007fff9cf74079 _NSHandleCarbonMenuEvent + 239
39 AppKit 0x00007fff9d1ee322 _DPSEventHandledByCarbon + 54
40 AppKit 0x00007fff9d5044eb -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 613
41 AppKit 0x00007fff9cde8fbd -[NSApplication run] + 926
42 AppKit 0x00007fff9cdb3a8a NSApplicationMain + 1237
43 SketchUp 0x000000010d622874 start + 52