( ($n : name == "Mark") )

com.github.javaparser.ParseProblemException: Encountered unexpected token: ":" ":"
    at line 1, column 5.

Was expecting one of:

    "!="
    "%"
    "%="
    "&"
    ...

Problem stacktrace : 
  org.drools.mvel.parser.GeneratedMvelParser.generateParseException(GeneratedMvelParser.java:12177)
  org.drools.mvel.parser.GeneratedMvelParser.jj_consume_token(GeneratedMvelParser.java:12022)
  org.drools.mvel.parser.GeneratedMvelParser.PrimaryPrefix(GeneratedMvelParser.java:3055)
  org.drools.mvel.parser.GeneratedMvelParser.PrimaryExpression(GeneratedMvelParser.java:2891)
  org.drools.mvel.parser.GeneratedMvelParser.PostfixExpression(GeneratedMvelParser.java:2792)
  org.drools.mvel.parser.GeneratedMvelParser.UnaryExpressionNotPlusMinus(GeneratedMvelParser.java:2772)
  org.drools.mvel.parser.GeneratedMvelParser.DrlxExpressionSwitch(GeneratedMvelParser.java:2687)
  org.drools.mvel.parser.GeneratedMvelParser.HalfBinaryExpression(GeneratedMvelParser.java:2625)
  org.drools.mvel.parser.GeneratedMvelParser.UnaryExpression(GeneratedMvelParser.java:2530)
  org.drools.mvel.parser.GeneratedMvelParser.MultiplicativeExpression(GeneratedMvelParser.java:2452)
  org.drools.mvel.parser.GeneratedMvelParser.AdditiveExpression(GeneratedMvelParser.java:2414)
  org.drools.mvel.parser.GeneratedMvelParser.ShiftExpression(GeneratedMvelParser.java:2378)
  org.drools.mvel.parser.GeneratedMvelParser.RelationalExpression(GeneratedMvelParser.java:2328)
  org.drools.mvel.parser.GeneratedMvelParser.InstanceOfExpression(GeneratedMvelParser.java:2309)
  org.drools.mvel.parser.GeneratedMvelParser.EqualityExpression(GeneratedMvelParser.java:2271)
  org.drools.mvel.parser.GeneratedMvelParser.AndExpression(GeneratedMvelParser.java:2249)
  org.drools.mvel.parser.GeneratedMvelParser.ExclusiveOrExpression(GeneratedMvelParser.java:2228)
  org.drools.mvel.parser.GeneratedMvelParser.InclusiveOrExpression(GeneratedMvelParser.java:2207)
  org.drools.mvel.parser.GeneratedMvelParser.ConditionalAndExpression(GeneratedMvelParser.java:2186)
  org.drools.mvel.parser.GeneratedMvelParser.ConditionalOrExpression(GeneratedMvelParser.java:2165)
  org.drools.mvel.parser.GeneratedMvelParser.ConditionalExpression(GeneratedMvelParser.java:2145)
  org.drools.mvel.parser.GeneratedMvelParser.Expression(GeneratedMvelParser.java:1978)
  org.drools.mvel.parser.GeneratedMvelParser.DrlxExpression(GeneratedMvelParser.java:5768)
  org.drools.mvel.parser.DrlxParser.lambda$null$0(DrlxParser.java:46)
  org.drools.mvel.parser.MvelParser.parse(MvelParser.java:155)
  org.drools.mvel.parser.DrlxParser.simplifiedParse(DrlxParser.java:60)
  org.drools.mvel.parser.DrlxParser.parseExpression(DrlxParser.java:56)
  org.drools.modelcompiler.builder.generator.DrlxParseUtil.parseExpression(DrlxParseUtil.java:624)

$b: B( ($Bid: id <= $Aid) && (id > ($Aid - 1 )))