java调用 transform 问题

[fqw1987815]

大家好！
使用kettle调用transform 正常结束
当用java调用同一transform的时候 出现错误如下：

2011/12/27 17:21:04:588 CST [INFO] DefaultFileReplicator - Using "C:\Users\acer\AppData\Local\Temp\vfs_cache" as temporary files store.
be.ibridge.kettle.core.exception.KettleXMLException:
错误从XML文件读取转换

Unable to load step info from XML step node

Unable to load class for step/plugin with id [TableInput].Check if the plugin is available in the plugins subdirectory of the Kettle distribution.

请大家给点意见，怎么解决！