Symfony2:如何使用 PropelBundle 进行 pgsql 数据库逆向工程?

我已经成功地将 Symfony2 与 PropelBundle 集成，但我在实现逆向工程过程中遇到了麻烦在 posgresql-8.4 服务器中部署的数据库上使用 pgsql 驱动程序.为了做到这一点，我运行了一个 php app/console propel:reverse 命令来生成 XML 模式，我得到了以下错误:

I've successfully integrated Symfony2 with PropelBundle but I'm having troubles to realize a reverse engineering process with a pgsql driver over a database deployed in a posgresql-8.4 server. In order to do that I ran a php app/console propel:reverse command to generate the XML schema and I obtained the following error:

[propel-schema-reverse] There was an error building XML from metadata:
  SQLSTATE[42704]: Undefined object: 7
  ERROR:  unrecognized configuration parameter "tables"

有什么想法吗?我的工作站是 Ubuntu 10.10，完整进程的控制台日志是:

Any ideas? My station is an Ubuntu 10.10 and the full process's console log was:

Use connection named default
Buildfile: /var/www/symfony2/vendor/propel/generator/build.xml
[resolvepath] Resolved /tmp/propel-gen to /tmp/propel-gen

propel-project-builder > check-project-or-dir-set:
propel-project-builder > check-project-set:
propel-project-builder > set-project-dir:
propel-project-builder > check-buildprops-exists:
propel-project-builder > check-buildprops-for-propel-gen:
propel-project-builder > check-buildprops:
propel-project-builder > configure:

     [echo] Loading project-specific props from /tmp/propel-gen/build.properties
 [property] Loading /tmp/propel-gen/build.properties

propel-project-builder > reverse:

    [phing] Calling Buildfile '/var/www/symfony2/vendor/propel/generator/build-propel.xml' with target 'reverse'
 [property] Loading /var/www/symfony2/vendor/propel/generator/./default.properties

propel > reverse:

     [echo] +-----------------------------------------------+
     [echo] |                                               |
     [echo] | Generating XML from PDO connection !          |
     [echo] |                                               |
     [echo] +-----------------------------------------------+

[propel-schema-reverse] Reading database structure...
[propel-schema-reverse] There was an error building XML from metadata: SQLSTATE[42704]: Undefined object: 7 ERROR:  unrecognized configuration parameter "tables"

BUILD FINISHED

Total time: 1.6386 second

[ErrorException]

  Warning: copy(/tmp/propel-gen/schema.xml): failed to open stream: No such file or directory in /var/www/symfony2/vendor/symfony/src/Symfony/Component/HttpKernel/Util/Filesystem.php line 44  

propel:reverse [--connection[="..."]]