Oracle10g 安装失败 （严重: 参数 PORT 的值 null 无效）

错误日志如下：
严重: 参数 PORT 的值 null 无效
有关详细资料, 请参阅 C:\oracle\product\10.2.0\db_1\cfgtoollogs\dbca\wscm\emConfig.log 中的日志文件。
2008-10-7 12:01:22 oracle.sysman.emcp.EMConfig perform
配置: Stack Trace: 
oracle.sysman.emcp.exception.EMConfigException: 参数 PORT 的值 null 无效
at oracle.sysman.emcp.ParamsManager.checkParam(ParamsManager.java:2630)
at oracle.sysman.emcp.EMDBPreConfig.checkConfigParams(EMDBPreConfig.java:1285)
at oracle.sysman.emcp.EMDBPreConfig.checkParameters(EMDBPreConfig.java:1060)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:174)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:160)
at oracle.sysman.emcp.EMConfig.perform(EMConfig.java:141)
at oracle.sysman.assistants.util.em.EMConfiguration.run(EMConfiguration.java:430)
at oracle.sysman.assistants.util.em.EMConfigStep.executeImpl(EMConfigStep.java:138)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.BasicStep.callStep(BasicStep.java:251)
at oracle.sysman.assistants.dbca.backend.PostDBConfigureStep.executeImpl(PostDBConfigureStep.java:240)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.Step.execute(Step.java:140)
at oracle.sysman.assistants.util.step.StepContext$ModeRunner.run(StepContext.java:2468)
at java.lang.Thread.run(Thread.java:534)
2008-10-7 12:02:03 oracle.sysman.emcp.EMConfig perform
信息: 正在将此操作记录到 C:\oracle\product\10.2.0\db_1\cfgtoollogs\dbca\wscm\emConfig.log。
2008-10-7 12:02:03 oracle.sysman.emcp.ParamsManager setFlag
配置: Flag 'CHECK_CONFIG' set to true
2008-10-7 12:02:03 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine connecting with SID: WSCM, oracleHome: C:\oracle\product\10.2.0\db_1, and user: SYS
2008-10-7 12:02:03 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine created successfully and connected
2008-10-7 12:02:03 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine connecting with SID: WSCM, oracleHome: C:\oracle\product\10.2.0\db_1, and user: DBSNMP
2008-10-7 12:02:03 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine created successfully and connected
2008-10-7 12:02:03 oracle.sysman.emcp.EMConfig perform
严重: 参数 PORT 的值 null 无效
有关详细资料, 请参阅 C:\oracle\product\10.2.0\db_1\cfgtoollogs\dbca\wscm\emConfig.log 中的日志文件。
2008-10-7 12:02:03 oracle.sysman.emcp.EMConfig perform
配置: Stack Trace: 
oracle.sysman.emcp.exception.EMConfigException: 参数 PORT 的值 null 无效
at oracle.sysman.emcp.ParamsManager.checkParam(ParamsManager.java:2630)
at oracle.sysman.emcp.EMDBPreConfig.checkConfigParams(EMDBPreConfig.java:1285)
at oracle.sysman.emcp.EMDBPreConfig.checkParameters(EMDBPreConfig.java:1060)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:174)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:160)
at oracle.sysman.emcp.EMConfig.perform(EMConfig.java:141)
at oracle.sysman.assistants.util.em.EMConfiguration.run(EMConfiguration.java:430)
at oracle.sysman.assistants.util.em.EMConfigStep.executeImpl(EMConfigStep.java:138)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.BasicStep.callStep(BasicStep.java:251)
at oracle.sysman.assistants.dbca.backend.PostDBConfigureStep.executeImpl(PostDBConfigureStep.java:240)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.Step.execute(Step.java:140)
at oracle.sysman.assistants.util.step.StepContext$ModeRunner.run(StepContext.java:2468)
at java.lang.Thread.run(Thread.java:534)
2008-10-7 12:09:36 oracle.sysman.emcp.EMConfig perform
信息: 正在将此操作记录到 C:\oracle\product\10.2.0\db_1\cfgtoollogs\dbca\wscm\emConfig.log。
2008-10-7 12:09:36 oracle.sysman.emcp.ParamsManager setFlag
配置: Flag 'CHECK_CONFIG' set to true
2008-10-7 12:09:36 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine connecting with SID: WSCM, oracleHome: C:\oracle\product\10.2.0\db_1, and user: SYS
2008-10-7 12:09:36 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine created successfully and connected
2008-10-7 12:09:36 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine connecting with SID: WSCM, oracleHome: C:\oracle\product\10.2.0\db_1, and user: DBSNMP
2008-10-7 12:09:36 oracle.sysman.emcp.util.GeneralUtil initSQLEngine
配置: SQLEngine created successfully and connected
2008-10-7 12:09:36 oracle.sysman.emcp.EMConfig perform
严重: 参数 PORT 的值 null 无效
有关详细资料, 请参阅 C:\oracle\product\10.2.0\db_1\cfgtoollogs\dbca\wscm\emConfig.log 中的日志文件。
2008-10-7 12:09:36 oracle.sysman.emcp.EMConfig perform
配置: Stack Trace: 
oracle.sysman.emcp.exception.EMConfigException: 参数 PORT 的值 null 无效
at oracle.sysman.emcp.ParamsManager.checkParam(ParamsManager.java:2630)
at oracle.sysman.emcp.EMDBPreConfig.checkConfigParams(EMDBPreConfig.java:1285)
at oracle.sysman.emcp.EMDBPreConfig.checkParameters(EMDBPreConfig.java:1060)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:174)
at oracle.sysman.emcp.EMDBPreConfig.invoke(EMDBPreConfig.java:160)
at oracle.sysman.emcp.EMConfig.perform(EMConfig.java:141)
at oracle.sysman.assistants.util.em.EMConfiguration.run(EMConfiguration.java:430)
at oracle.sysman.assistants.util.em.EMConfigStep.executeImpl(EMConfigStep.java:138)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.BasicStep.callStep(BasicStep.java:251)
at oracle.sysman.assistants.dbca.backend.PostDBConfigureStep.executeImpl(PostDBConfigureStep.java:240)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.Step.execute(Step.java:140)
at oracle.sysman.assistants.util.step.StepContext$ModeRunner.run(StepContext.java:2468)
at java.lang.Thread.run(Thread.java:534)
请问这个问题如何解决