Re: [rules-users] Problem when I cleaning the production memory.

Hi Davide, Thanks for the reply. Unfortunately I cannot migrate to version 5.6 or newer. Today I have inspected that part of code, but it is quite huge and complex in the Reeteo part. I have seen the NullPointer is due to the "nodes" retrieved from the "rules" Map (line 250). Moreover, this non-deterministic behaviour complicates everything. 65 private Map<Rule, BaseNode[]> rules; 244 public synchronized void More ...removeRule(final Rule rule) { 245 // reset working memories for potential propagation 246 InternalWorkingMemory[] workingMemories = this.ruleBase.getWorkingMemories(); 247 248 final Object object = this.rules.remove( rule ); 249 250 final BaseNode[] nodes = (BaseNode[]) object; 251 final RuleRemovalContext context = new RuleRemovalContext( rule ); 252 for (final BaseNode node : nodes) { 253 node.remove( context, 254 this, 255 null, 256 workingMemories ); 257 } 258 259 resetMasks(context); 260 } I don't know if you can help me in some way... Thanks in all cases. Andrea -- View this message in context: http://drools.46999.n3.nabble.com/Problem-when-I-cleaning-the-production-... Sent from the Drools: User forum mailing list archive at Nabble.com.