Immediately fails

[grosch]

Any plans to update this to current OS and Xcode? It builds OK but when I run it immediately fails.

2017-07-14 19:17:25.444821-0700 XSDConverter[4863:2210945] [General] -[__NSCFConstantString characterAtIndex:]: Range or index out of bounds
2017-07-14 19:17:25.448390-0700 XSDConverter[4863:2210945] [General] (
0 CoreFoundation 0x00007fffa0f8457b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fffb61c81da objc_exception_throw + 48
2 CoreFoundation 0x00007fffa1001c55 +[NSException raise:format:] + 197
3 CoreFoundation 0x00007fffa0efd396 -[__NSCFString characterAtIndex:] + 102
4 XSDConverterCore 0x00000001000e4d9f -[XSDschema setTargetNamespacePrefixOverride:] + 991
5 XSDConverterCore 0x00000001000e2153 -[XSDschema initWithNode:targetNamespacePrefix:error:] + 531
6 XSDConverterCore 0x00000001000e3966 -[XSDschema initWithUrl:targetNamespacePrefix:error:] + 726
7 XSDConverter 0x0000000100002e3d -[AppDelegate writeCode:] + 1133
8 libsystem_trace.dylib 0x00007fffb6cdb3a7 _os_activity_initiate_impl + 53
9 AppKit 0x00007fff9f172721 -[NSApplication(NSResponder) sendAction:to:from:] + 456
10 AppKit 0x00007fff9ec56cc4 -[NSControl sendAction:to:] + 86
11 AppKit 0x00007fff9ec56bec __26-[NSCell _sendActionFrom:]_block_invoke + 136
12 libsystem_trace.dylib 0x00007fffb6cdb3a7 _os_activity_initiate_impl + 53
13 AppKit 0x00007fff9ec56b44 -[NSCell _sendActionFrom:] + 128
14 AppKit 0x00007fff9ec99539 -[NSButtonCell _sendActionFrom:] + 98
15 libsystem_trace.dylib 0x00007fffb6cdb3a7 _os_activity_initiate_impl + 53
16 AppKit 0x00007fff9ec55426 -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 2481
17 AppKit 0x00007fff9ec99272 -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 798
18 AppKit 0x00007fff9ec53ddb -[NSControl mouseDown:] + 832
19 AppKit 0x00007fff9f2ee24f -[NSWindow(NSEventRouting) _handleMouseDownEvent:isDelayedEvent:] + 6341
20 AppKit 0x00007fff9f2eaa6c -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 1942
21 AppKit 0x00007fff9f2e9f0a -[NSWindow(NSEventRouting) sendEvent:] + 541
22 AppKit 0x00007fff9f16e681 -[NSApplication(NSEvent) sendEvent:] + 1145
23 AppKit 0x00007fff9e9e9427 -[NSApplication run] + 1002
24 AppKit 0x00007fff9e9b3e0e NSApplicationMain + 1237
25 XSDConverter 0x0000000100001552 main + 34
26 libdyld.dylib 0x00007fffb6aa9235 start + 1
27 ??? 0x0000000000000003 0x0 + 3
)