Re: [rules-users] Need Help: Errors while running FibonacciExample

Hi, After successfully compiling the example code FibnacciExample.java, I tried to run it, I get the following error, let me know how to solve it: java FibonacciExample Exception in thread "main" java.lang.ExceptionInInitializerError at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0) at org.drools.semantics.java.RuleBuilder.<clinit>() (Unknown Source) at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0) at org.drools.compiler.PackageBuilder.addRule(org.drools.lang.descr.RuleDescr) (Unknown Source) at org.drools.compiler.PackageBuilder.addPackage( org.drools.lang.descr.PackageDescr) (Unknown Source) at org.drools.compiler.PackageBuilder.addPackageFromDrl(java.io.Reader) (Unknown Source) at FibonacciExample.main(java.lang.String[]) (Unknown Source) at gnu.java.lang.MainThread.call_main() (/usr/lib/libgcj.so.6.0.0) at gnu.java.lang.MainThread.run() (/usr/lib/libgcj.so.6.0.0) Caused by: java.util.regex.PatternSyntaxException: At position 2 in regular expression pattern: expected end of character class (.*)\bmodify\s*\(([^)]+)\)(.*) ^ at java.util.regex.Pattern.Pattern(java.lang.String, int) (/usr/lib/libgcj.so.6.0.0) at java.util.regex.Pattern.compile(java.lang.String, int) (/usr/lib/libgcj.so.6.0.0) at org.drools.semantics.java.KnowledgeHelperFixer.<clinit>() (Unknown Source) at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0) ...8 more Is it require to place .drl file in the same directory as that of the source code ? Thanks, Venkatesh