Openbravo export.database：线程“主”中的异常java.lang.NullPointerException

Question

我正在遵循</wiki/ERP/2.50/Developers_Guide/How_To_Create_and_Package_a_Module>上的指南。

但是，步骤ant export.database与Exception in thread "main" java.lang.NullPointerException并存。

错误原因可能是什么？

---

Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3>ant export.database
Buildfile: Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3\build.xml

init:

core.lib:

init:

compile:

build.jar:

build:

database.lib:

compile:

jar:

generate.entities.quick:

init:

compile.src.gen:
    [javac] Compiling 4 source files to Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3\build\classes
     [copy] Copying 53 files to Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3\build\classes

generate.entities.quick:
     [java] 6245  [main] INFO  org.openbravo.base.gen.GenerateEntitiesTask - Model has not changed since last run, not re-generating entities
    [javac] Compiling 1 source file to Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3\build\classes

export.database:

export.database.structure:
     [java] 980   [main] INFO  org.openbravo.dal.core.DalLayerInitializer - Initializing in-memory model...
     [java] 1235  [main] INFO  org.openbravo.base.model.ModelProvider - Building runtime model
     [java] 6183  [main] INFO  org.openbravo.dal.core.DalLayerInitializer - Model read in-memory, generating mapping...
     [java] 14417 [main] INFO  org.openbravo.dal.core.DalLayerInitializer - Dal layer initialized
     [java] 14591 [main] INFO  org.openbravo.ddlutils.task.ExportDatabase - Database connection: jdbc:postgresql://localhost:5432/openbravo. User: tad
     [java] 15308 [main] INFO  org.apache.ddlutils.platform.PlatformImplBase - Loading model from database...
     [java] 15319 [main] INFO  org.apache.ddlutils.platform.PlatformImplBase - Reading tables...
     [java] Exception in thread "main" java.lang.NullPointerException
     [java]     at org.openbravo.ddlutils.task.ExportDatabase.execute(ExportDatabase.java:312)
     [java]     at org.openbravo.ddlutils.task.ExportDatabase.main(ExportDatabase.java:77)
     [java] Caused by: java.lang.NullPointerException
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase$6.fillRow(ModelLoaderBase.java:330)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase.fillList(ModelLoaderBase.java:871)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase.readTable(ModelLoaderBase.java:327)
     [java]     at org.apache.ddlutils.platform.postgresql.PostgreSqlModelLoader.readTable(PostgreSqlModelLoader.java:645)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase$1.getRow(ModelLoaderBase.java:248)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase.readList(ModelLoaderBase.java:816)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase.readTables(ModelLoaderBase.java:244)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase.readDatabase(ModelLoaderBase.java:194)
     [java]     at org.apache.ddlutils.platform.postgresql.PostgreSqlModelLoader.readDatabase(PostgreSqlModelLoader.java:90)
     [java]     at org.apache.ddlutils.platform.ModelLoaderBase.getDatabase(ModelLoaderBase.java:121)
     [java]     at org.apache.ddlutils.platform.PlatformImplBase.loadModelFromDatabase(PlatformImplBase.java:2297)
     [java]     at org.apache.ddlutils.platform.PlatformImplBase.loadModelFromDatabase(PlatformImplBase.java:2287)
     [java]     at org.openbravo.ddlutils.task.ExportDatabase.execute(ExportDatabase.java:132)
     [java]     ... 1 more

BUILD FAILED
Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3\build.xml:700: The following error occurred while executing this line:
Z:\DK\openbravo-3.0PR19Q3\Openbravo-3.0PR19Q3\src-db\database\build.xml:122: Java returned: 1

Total time: 31 seconds