Anthill says: Failed to Build project. Error: 1

I am getting the following error when I try to run the ant target from
within Anthill (version 1.8.0.264).

16:27:42:370 [Thread - AnthillBuildDaemon] ERROR
com.urbancode.anthill.BuildManager  - Failed to Build project. Error: 1
java.lang.Exception: Failed to Build project. Error: 1
        at
com.urbancode.anthill.BuildManager.buildProject(BuildManager.java:523)
        at
com.urbancode.anthill.BuildManager.runBuild(BuildManager.java:401)
        at
com.urbancode.anthill.BuildManager.build(BuildManager.java:185)
        at
com.urbancode.anthill.AnthillProject.releaseProject(AnthillProject.java:231)
        at
com.urbancode.anthill.BuildDefinition.run(BuildDefinition.java:158)
        at com.urbancode.anthill.DependencyGroup
$Member.build(DependencyGroup.java:572)
        at
com.urbancode.anthill.DependencyGroup.run(DependencyGroup.java:384)
        at com.urbancode.anthill.BuildDaemon.run(BuildDaemon.java:73)

Based on the logs, all the tests pass. All the tests also pass from the
command line with the same target, so it looks like something within
Anthill.

I have used CruiseControl in the past, where this kind of error meant
something to do with system resources, such as a hung appserver, or no
disk space to write to. Fixing/Restarting the appserver usually took
care of that. I tried that too, but no luck.

Any pointers on where to look at would be really appreciated.

Also, Anthill was installed by my predecessor and he did not pull in the
source code. Is there some place where I can pull in the latest version
of Anthill OS with source?

TIA
Sujit