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From "Dean A. Hoover" <>
Subject newbie: jjtree task
Date Mon, 10 Feb 2003 02:38:50 GMT
I'm using redhat 8.0 with ant 1.5.1 already installed. I am new to ant.
I am building a jjtree based parser which I have been building
"by hand" up to this point. I now want to use ant for this purpose.
I am using jjtree version 2.1 and j2sdk1.4.1_01

I set up the following build.xml file:
<project name="meds" basedir="." default="dojjtree">
    <target name="dojjtree">
This is what I get when I run ant:
Buildfile: build.xml


file:/home/dhoover/devel/meds/build.xml:7: Could not create task or type 
of type: jjtree.

Ant could not find the task or a class this task relies upon.

This is common and has a number of causes; the usual
solutions are to read the manual pages then download and
install needed JAR files, or fix the build file:
 - You have misspelt 'jjtree'.
   Fix: check your spelling.
 - The task needs an external JAR file to execute
   and this is not found at the right place in the classpath.
   Fix: check the documentation for dependencies.
   Fix: declare the task.
 - The task is an Ant optional task and optional.jar is absent
   Fix: look for optional.jar in ANT_HOME/lib, download if needed
 - The task was not built into optional.jar as dependent
   libraries were not found at build time.
   Fix: look in the JAR to verify, then rebuild with the needed
   libraries, or download a release version from
 - The build file was written for a later version of Ant
   Fix: upgrade to at least the latest release version of Ant
 - The task is not an Ant core or optional task
   and needs to be declared using <taskdef>.

Remember that for JAR files to be visible to Ant tasks implemented
in ANT_HOME/lib, the files must be in the same directory or on the

Please neither file bug reports on this problem, nor email the
Ant mailing lists, until all of these causes have been explored,
as this is not an Ant bug.

Total time: 0 seconds
Remember, I did not install ant myself, it is part of rh8. I do not know
where ANT_HOME is, and I wouldn't know what to put in there even
if I did. ant works for me for javac tasks. Can anyone give me some
hints on how to get this working?

Dean Hoover

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