如在修改SVN項目日誌的時候提示如下錯誤信息，說明SVN默認不允許直接修改LOG文件，實現在HOOK文件夾中實現相關勾子腳本去打開。
在SVN數據庫的HOOK目錄下創建"pre-revprop-change.bat"文件（ http://pan.baidu.com/s/1kTkPAg3），並輸入以下信息即可。
@ECHO OFF
set repos=%1
set rev=%2
set user=%3
set propname=%4
set action=%5
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:: Only allow changes to svn:log. The author, date and other revision
:: properties cannot be changed
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
if /I not '%propname%'=='svn:log' goto ERROR_PROPNAME
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:: Only allow modifications to svn:log (no addition/overwrite or deletion)
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
if /I not '%action%'=='M' goto ERROR_ACTION
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: Make sure that the new svn:log message contains some text.
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
set bIsEmpty=true
for /f "tokens=*" %%g in ('find /V ""') do (
set bIsEmpty=false
)
if '%bIsEmpty%'=='true' goto ERROR_EMPTY
goto :eof
:ERROR_EMPTY
echo Empty svn:log properties are not allowed. >&2
goto ERROR_EXIT
:ERROR_PROPNAME
echo Only changes to svn:log revision properties are allowed. >&2
goto ERROR_EXIT
:ERROR_ACTION
echo Only modifications to svn:log revision properties are allowed. >&2
goto ERROR_EXIT
:ERROR_EXIT
exit 1