Opened an existing XSL sheet and clicked the WYSIWYG button.
Crash.
See below for log:
//=====================================================
Date: Wed Dec 18 16:38:04 2002
Exception code: E06D7363 
Fault address:  77EAB2F0 01:0002A2F0 C:\WINNT\system32\KERNEL32.dll

Registers:
EAX:0012E4A8
EBX:027247AC
ECX:00000000
EDX:028F13A8
ESI:0012E538
EDI:0012E4C8
CS:EIP:001B:77EAB2F0
SS:ESP:0023:0012E4A0  EBP:0012E4F8
DS:0023  ES:0023  FS:003B  GS:0000
Flags:00000206

Loaded modules:
C:\Program Files\eXcelon Corp\Stylus Studio\bin\Struzzo.exe ver. 4.5 build 103m
C:\WINNT\System32\ntdll.dll ver. 5.00.2195.5400
C:\Program Files\eXcelon Corp\Stylus Studio\bin\xmlengine.dll ver. 2, 1, 0 build 
C:\WINNT\system32\KERNEL32.dll ver. 5.00.2195.6011
C:\WINNT\system32\USER32.dll ver. 5.00.2195.6000
C:\WINNT\system32\GDI32.dll ver. 5.00.2195.5907
C:\Program Files\eXcelon Corp\Stylus Studio\bin\xmlconvengine.dll
C:\Program Files\eXcelon Corp\Stylus Studio\bin\xmlconvengine_data.dll
C:\WINNT\system32\MSVCRT.dll ver. 6.10.9359.0
C:\WINNT\System32\MSVCIRT.dll ver. 6.10.8637.0
C:\Program Files\eXcelon Corp\Stylus Studio\bin\tls7012d.dll
C:\WINNT\System32\MSVCP60.dll ver. 6.00.8972.0
C:\WINNT\system32\WININET.dll ver. 6.00.2800.1106
C:\WINNT\system32\ADVAPI32.dll ver. 5.00.2195.5992
C:\WINNT\system32\RPCRT4.dll ver. 5.00.2195.5419
C:\WINNT\system32\CRYPT32.dll ver. 5.131.2195.6072
C:\WINNT\system32\MSASN1.dll ver. 5.00.2195.4067
C:\WINNT\system32\OLEAUT32.dll ver. 2.40.4518
C:\WINNT\system32\ole32.dll ver. 5.00.2195.5400
C:\WINNT\system32\SHLWAPI.dll ver. 6.00.2800.1106
C:\WINNT\system32\VERSION.dll ver. 5.00.2134.1
C:\WINNT\system32\LZ32.DLL ver. 5.00.2134.1
C:\WINNT\System32\HHCTRL.OCX ver. 5.2.3669.0
C:\WINNT\system32\SHELL32.dll ver. 5.00.3502.5436
C:\WINNT\system32\COMCTL32.DLL ver. 5.50.4916.400
C:\Program Files\eXcelon Corp\Stylus Studio\bin\StCmn.dll
C:\WINNT\System32\MFC42u.DLL ver. 6.0.400
C:\Program Files\eXcelon Corp\Stylus Studio\bin\SFL11ASU.dll ver. 1.1.000
C:\WINNT\system32\comdlg32.dll ver. 5.00.3315.3727
C:\WINNT\System32\WINSPOOL.DRV ver. 5.00.2195.5225
C:\WINNT\system32\MPR.DLL ver. 5.00.2195.3649
C:\Program Files\eXcelon Corp\Stylus Studio\bin\OT711ASU.dll ver. 7.1.100
C:\WINNT\System32\OLEPRO32.DLL ver. 2.40
C:\WINNT\System32\MSVFW32.dll ver. 5.00.2134.1
C:\WINNT\System32\WINMM.dll ver. 5.00.2161.1
C:\Program Files\eXcelon Corp\Stylus Studio\bin\vc6-re200l.dll
C:\Program Files\eXcelon Corp\Stylus Studio\bin\OG811ASU.dll ver. 8.11.000
C:\WINNT\System32\oledlg.dll ver. 2.01
C:\Program Files\eXcelon Corp\Stylus Studio\bin\SmartEdit.dll
C:\Program Files\eXcelon Corp\Stylus Studio\bin\OE611ASU.dll ver. 6.1.100
C:\WINNT\System32\IMM32.dll ver. 5.00.2195.4314
C:\Program Files\eXcelon Corp\Stylus Studio\bin\StylusHlp.dll
C:\Program Files\eXcelon Corp\Stylus Studio\bin\StPreview.dll
C:\Program Files\eXcelon Corp\Stylus Studio\bin\DBGHELP.dll ver. 5.00.2195.1
C:\WINNT\System32\LPK.DLL ver. 5.00.2195.4506
C:\WINNT\System32\USP10.dll ver. 1.0325.2195.4506
C:\WINNT\System32\WSOCK32.dll ver. 5.00.2195.4874
C:\WINNT\System32\WS2_32.DLL ver. 5.00.2195.4874
C:\WINNT\System32\WS2HELP.DLL ver. 5.00.2134.1
C:\WINNT\System32\INDICDLL.dll ver. 5.00.2920.0000
C:\WINNT\System32\CLBCATQ.DLL ver. 03.00.00.3497
C:\WINNT\System32\shdocvw.dll ver. 6.00.2800.1106
C:\WINNT\System32\shdoclc.dll ver. 6.00.2800.1106
C:\WINNT\system32\urlmon.dll ver. 6.00.2800.1126
C:\WINNT\System32\mshtml.dll ver. 6.00.2800.1126
C:\Program Files\eXcelon Corp\Stylus Studio\bin\Plugins\DbgMgr.dll ver. 4.5.0 build 103m
C:\Program Files\eXcelon Corp\Stylus Studio\bin\Plugins\debugger.dll ver. 4.5.0 build 103m
C:\Program Files\eXcelon Corp\Stylus Studio\bin\Plugins\Stylus.dll ver. 4.5.0 build 103m
C:\Program Files\eXcelon Corp\Stylus Studio\bin\Plugins\XmlEdit.dll ver. 4.5.0 build 103m
C:\Program Files\eXcelon Corp\Stylus Studio\bin\Plugins\xquery.dll ver. 4.5.0 build 013m
C:\Program Files\eXcelon Corp\Stylus Studio\bin\icuin20.dll
C:\PROGRA~1\MOUSEW~1\SYSTEM\LGMOUSHK.dll ver. 9.73
C:\WINNT\System32\NTMARTA.DLL ver. 5.00.2195.4836
C:\WINNT\system32\WLDAP32.dll ver. 5.00.2195.5944
C:\WINNT\System32\SAMLIB.dll ver. 5.00.2195.4827
C:\WINNT\System32\NTDSAPI.dll ver. 5.00.2195.4827
C:\WINNT\System32\DNSAPI.DLL ver. 5.00.2195.6012
C:\WINNT\System32\NETAPI32.DLL ver. 5.00.2195.5979
C:\WINNT\System32\Secur32.dll ver. 5.00.2195.4587
C:\WINNT\System32\NETRAP.dll ver. 5.00.2134.1
C:\WINNT\System32\mlang.dll ver. 6.00.2800.1106
C:\WINNT\System32\jscript.dll ver. 5.6.0.6626
C:\WINNT\System32\MSLS31.DLL ver. 3.10
C:\WINNT\System32\ntlanman.dll ver. 5.00.2195.5428
C:\WINNT\System32\NETUI0.DLL ver. 5.00.2195.4874
C:\WINNT\System32\NETUI1.DLL ver. 5.00.2134.1
C:\WINNT\System32\browseui.dll ver. 6.00.2800.1106
C:\WINNT\System32\imgutil.dll ver. 6.00.2800.1106
C:\WINNT\System32\mshtmled.dll ver. 6.00.2800.1106

Call stack:
Address       Function
0001:0002A2F0 RaiseException+56
              C:\WINNT\system32\KERNEL32.dll
0001:0000A78D CxxThrowException+34
              C:\WINNT\system32\MSVCRT.dll
0001:0003B8A0 RWThrow+20
              C:\Program Files\eXcelon Corp\Stylus Studio\bin\tls7012d.dll
0001:000A94F0 CSegOutputHandler::endElement(0x12EA01)+260
              Source file Y:\users\minollo\StruzzoVersions\4.5_BL103\Stylus\Design\SegOutputHandler.cpp, line 158
0001:000A1998 CXProcess::instantiateTemplate+4B98
              Source file Y:\users\minollo\StruzzoVersions\4.5_BL103\StylusHlp\XProcess\XProcess.cpp, line 2494