<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1; mso-font-alt:SimSun; mso-font-charset:134; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:3 680460288 22 0 262145 0;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-family:"/@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1; mso-font-charset:134; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:3 680460288 22 0 262145 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:宋体; mso-bidi-font-family:宋体;} a:link, span.MsoHyperlink {mso-style-noshow:yes; mso-style-priority:99; color:blue; text-decoration:underline; text-underline:single;} a:visited, span.MsoHyperlinkFollowed {mso-style-noshow:yes; mso-style-priority:99; color:purple; mso-themecolor:followedhyperlink; text-decoration:underline; text-underline:single;} pre {mso-style-noshow:yes; mso-style-priority:99; mso-style-link:"HTML 预设格式 Char"; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:宋体; mso-bidi-font-family:宋体;} span.HTMLChar {mso-style-name:"HTML 预设格式 Char"; mso-style-noshow:yes; mso-style-priority:99; mso-style-unhide:no; mso-style-locked:yes; mso-style-link:"HTML 预设格式"; mso-ansi-font-size:12.0pt; mso-bidi-font-size:12.0pt; font-family:宋体; mso-ascii-font-family:宋体; mso-fareast-font-family:宋体; mso-hansi-font-family:宋体; mso-bidi-font-family:宋体;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt; mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"; mso-font-kerning:0pt;} /* Page Definitions */ @page {mso-page-border-surround-header:no; mso-page-border-surround-footer:no;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> 

Note: For additional ORA-600 related information please read 
Note:146580.1
PURPOSE:
This article discusses the internal error "ORA-600 [4193]", what
it means and possible actions. The information here is only applicable
to the versions listed and is provided only for guidance.
ERROR:
ORA-600 [4193] [a] [b]
VERSIONS:
versions 6.0 to 10.1
DESCRIPTION:
A mismatch has been detected between Redo records and Rollback (Undo)
records.
We are validating the Undo block sequence number in the undo block against
the Redo block sequence number relating to the change being applied.
This error is reported when this validation fails.
ARGUMENTS:
Arg [a] Undo record seq number
Arg [b] Redo record seq number