使用congfigtool.bat时，不小心误操作把instance_ID23801节点的max heap size改错成3000m，怎么办？
原先是256m的，但是改成3000后，netweaver重新启动不成功，再去congfigtool.bat把max heap size改成256m，
结果启动netweaver时日志报错：
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JStartupIReadSection: read node properties [bootstrap]
-> node name : bootstrap
-> node type : bootstrap
-> node execute : yes
-> java path : C:\j2sdk1.4.2_18
-> java parameters : -Djco.jarm=1
-> java vm version : 1.4.2_18-b06
-> java vm vendor : Java HotSpot(TM) Server VM (Sun Microsystems Inc.)
-> java vm type : server
-> java vm cpu : x86
-> heap size : 3000M
-> root path : D:\usr\sap\FZB\JC00\j2ee\cluster
-> class path : .\bootstrap\launcher.jar
-> OS libs path : D:\usr\sap\FZB\JC00\j2ee\os_libs
-> main class : com.sap.engine.offline.OfflineToolStart
-> framework class : com.sap.bc.proj.jstartup.JStartupFramework
-> registr. class : com.sap.bc.proj.jstartup.JStartupNatives
-> framework path : D:\usr\sap\FZB\JC00\exe\jstartup.jar;D:\usr\sap\FZB\JC00\exe\jvmx.jar
-> parameters : com.sap.engine.bootstrap.Bootstrap ./bootstrap ID0054866
-> debuggable : yes
-> debug mode : no
-> debug port : 60000
-> shutdown timeout : 120000
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JControlStartJLaunch: program = D:\usr\sap\FZB\JC00\exe\jlaunch.exe
-> arg[00] = D:\usr\sap\FZB\JC00\exe\jlaunch.exe
-> arg[01] = pf=D:\usr\sap\FZB\SYS\profile\FZB_JC00_tzgl
-> arg[02] = -DSAPINFO=FZB_00_bootstrap
-> arg[03] = -nodeId=-1
-> arg[04] = -file=D:\usr\sap\FZB\JC00\j2ee\cluster\instance.properties
-> arg[05] = -syncSem=JSTARTUP_WAIT_ON_3732
-> arg[06] = -nodeName=bootstrap
-> arg[07] = -jvmOutFile=D:\usr\sap\FZB\JC00\work\jvm_bootstrap.out
-> arg[08] = -stdOutFile=D:\usr\sap\FZB\JC00\work\std_bootstrap.out
-> arg[09] = -locOutFile=D:\usr\sap\FZB\JC00\work\dev_bootstrap
-> arg[10] = -mode=BOOTSTRAP
-> arg[11] = pf=D:\usr\sap\FZB\SYS\profile\FZB_JC00_tzgl
-> lib path = PATH=C:\j2sdk1.4.2_18\jre\bin\server;C:\j2sdk1.4.2_18\jre\bin;D:\oracle\FZB\102\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;;D:\usr\sap\FZB\SYS\exe\uc\NTI386
-> exe path = PATH=C:\j2sdk1.4.2_18\bin;D:\usr\sap\FZB\JC00\j2ee\os_libs;D:\oracle\FZB\102\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;;D:\usr\sap\FZB\SYS\exe\uc\NTI386
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[Thr 988] Mon Oct 18 09:19:31 2010
[Thr 988] *** ERROR => invalid return code of process [bootstrap] (exitcode = -2) [jstartxx.c 1642]
[Thr 988] JControlExecuteBootstrap: error executing bootstrap node [bootstrap] (rc = -2)
[Thr 988] JControlCloseProgram: started (exitcode = -2)
[Thr 988] JControlCloseProgram: good bye... (exitcode = -2)