<p>recently I downloaded this open source project and I am trying to compile it.</p>

<p>However, one of the line is giving me an error.</p>

<p>"import com.sun.org.apache.xpath.internal.functions.WrongNumberArgsException;"</p>

<p>Seems that i am missing a library.... is there a way to know WHICH library do I need?</p>

<p>I tried searching on google for com.sun.org.apache.xpath.internal.functions,
while there seem to be a result on kickjava.com/src containing the source code.</p>

<p>I think i need the Jar file right?</p>

<p>I tried downloading xalan from apache and it didn't work.
I tried to see if there's a xpath library, but I dont think there's a xpath library?
searching for xpath led me to xalan.
I have also tried Xerces-J-bin.2.9.1 .</p>

<p>Thanks!</p>

<hr>

The
WrongNumberArgsException
class in Xalan is in the
```
org.apache.xpath.functions
```
package.  With the Xalan jar in your project, you should just be able to change the import statement in the open source code to use the correct path.