How can I know from which page a user came??

Hi.
There is a way to know what was the previous page in the usrs browsers, but I don't know how.
Can you help me?
The problem is:
I have an error page that writes exception info on the screen:
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
exception.printStackTrace(pw);
String msg = sw.toString();
It works fine, and usualy in the msg I have all info about the page that the exception ocured in.
But when it is an SQL exception, I don't know what jsp page made that SQL call.
So I want to print the path of the page previous to the error page.
Thanks for Help.
Vadim.

Greetings,
There is a way to know what was the previous page in
the usrs browsers, but I don't know how.
Can you help me?Get the HTTP request header 'Referer':
<a href='<%= request.getHeader( "Referer" ) %>'>Return to main page</a>I hope this helps.
Thanks for Help.
Vadim.Regards,
Tony "Vee Schade" Cook

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105 SY-VLINE.
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105 SY-VLINE.
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ENDAT.
ENDLOOP.
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SKIP.
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ELSE.
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ENDIF.
ELSE.
FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
WRITE:/(105) 'Transaction does not exist'.
ENDIF.
AT LINE-SELECTION.
data : wf_object type tadir-object.
clear wf_object.
GET CURSOR FIELD FIELD1.
CHECK FIELD1(8) EQ 'WA_TADIR'.
read table jtab with key obj_name = sy-lisel+1(20).
move jtab-object to wf_object.
case wf_object.
when 'SMOD'.
SET PARAMETER ID 'MON' FIELD SY-LISEL+1(10).
CALL TRANSACTION 'SMOD' AND SKIP FIRST SCREEN.
when 'SXSD'.
SET PARAMETER ID 'EXN' FIELD SY-LISEL+1(20).
CALL TRANSACTION 'SE18' AND SKIP FIRST SCREEN.
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