Hi,
ANTLRWorks 1.3.1 is now available from http://www.antlr.org/works/index.html. It includes the following fixes:
[AW-256] - NPE when attempting to debug
[AW-257] - Issue parsing IntelliJ build number (IntelliJ 9)
[AW-258] - Use UTF-8 encoding for debug input file
Regards,
Jean