Tracing inside Try ENDTRY is funny

TRY
*Was zu testen ist
  1=''
 CATCH
* Abzufangender Fehler
  DEBUG
  SUSPEND
  ?1
  ?''=1
  ?122


 FINALLY
*
ENDTRY

>Set a breakpoint at the first line, and open the debugger. Then you step through each line, and notice what's going on.
>
>>>And which line is no. 26?
>>
>>Sorry it was line 28 - ENDTRY
>>>
>>>>>Would be nice to know the errorcodes :)
>>>>
>>>>Unhandled structured exception
>>>>Error no 1429
>>>>Lineno26
>>>>
>>>>
>>>>>
>>>>>>I haven't used functions before - I have always avoided them - this is my code but it gives errors
>>>>>>
>>>>>>

>>>>>>DO xls_import
>>>>>>
>>>>>>FUNCTION xls_import
>>>>>> 
>>>>>>
>>>>>>PARAMETERS tcFile
>>>>>>** Replaces VFP Import Command for XLS.  VFP Command does not accept xlsx file formats
>>>>>>** First try the standard import.  
>>>>>>** If it failes with error code 1661 (Microsoft Excel file format is invalid.) then open Excel and resave with format 39( xlExcel5, xlExcel7 )
>>>>>>** Try to import again.
>>>>>>** If it succeeds, return the name of the table
>>>>>>** If it still fails, return an empty string.  Calling program will check for EMPTY() to determine success
>>>>>>
>>>>>>LOCAL lcReturn,lcNewFile
>>>>>>lcReturn = ""
>>>>>>
>>>>>>TRY
>>>>>>	IMPORT FROM ("c:\colin.xlsx") XLS
>>>>>>	lcReturn = DBF()
>>>>>>CATCH
>>>>>>	=AERROR(abcde)
>>>>>>	IF abcde[1] = 1661
>>>>>>		tmpoxl=CREATEOBJECT("excel.application")
>>>>>>		tmpoxl.DisplayAlerts = .F.
>>>>>>		tmpoxl.Application.WorkBooks.Open(tcFile)
>>>>>>		lcNewFile = "c:\tempdl\" + JUSTFNAME(tcfile)
>>>>>>		tmpoxl.activeworkbook.saveas(lcnewfile,39)
>>>>>>		tmpoxl.quit
>>>>>>		tmpoxl= .null.
>>>>>>		TRY
>>>>>>			IMPORT FROM (lcnewfile) xls
>>>>>>			lcReturn = DBF()
>>>>>>		CATCH
>>>>>>		ENDTRY
>>>>>>		DELETE FILE (lcnewfile)
>>>>>>	ENDIF
>>>>>>ENDTRY
>>>>>>RETURN lcReturn
>>>>>>