FormDiff这个工具可以比较ORACLE Form开发的Form不同版本之间的差异，不知道哪位大侠用过？请指教一下。。
我从下面网址下了个免费版，成功安装了(要先安装Caffo Utilities和.net Framwork 1.1)，可是使用时报错(如下图)：对象没有实例化。。
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Download web: www.rhea.be
Size: 5.24 MB
If you want to figure out the differences between two versions of a form module or a PLL, you can use the Caffo Forms Diff. It presents you a rich compare interface, which shows you to easily see all the differences between them. Objects that are present in one module, but not in the other will be marked so you can find out which objects are removed or added. The PL/SQL code inside the two modules is shown to you using the longest common substring algorithm, giving you a very good idea of the code-changes.
Requirements: Caffo Utilities
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PS：下面是网上提供的安装提示，我不知道该怎么设置：PATH environment variable of your system(Oracle安装路径的环境变量？)，不知道是不是就是这设置没设才造成我的问题？
Important note: This note is important if you have Forms 6i and Forms 9i/10g installed on the same machine!
If you want to run a 6i utility, you will have to make sure that the "$ORACLE_HOME/bin" of the Forms 6i installation appears first in the PATH environment variable of your system.
If you want to run a 9i/10g utility, you will have to make sure that the "$ORACLE_HOME/bin" of the Forms 9i installation appears first in the PATH environment variable of your system.
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使用效果圖(網上提供的)：
我的錯誤1：
我的錯誤2：
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说不定安装文件不完整,以致某些对象找不到?
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怎么看不到图?!
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