[rules-users] averages on different data types

Hi guys, Building from the stockticker sample, I have been running my own average aggregates over time and window length and I have the following rule.it simply runs a last 10 average and outputs the average(in theory). rule "show averages" when $n : Number( doubleValue > 0 ) from accumulate ( $mdo : MyDataObject($tm: delayTime) over window:length(10) from entry-point "DataObject stream", average( $tm ) ) then System.err.println($tm); End I have set the limit to 0 for the average because I simply want to have it fire every time, no matter the average(they are all positive) However I get this error: Unable to build expression for 'consequence': Failed to compile: 1 compilation error(s): - (1,3) unqualified type in strict mode for: $tm ' System.err.println($tm); ' : [Rule name='show averages'] If I have the consequence System.err.println($n); Then it outputs the average no problem, but I am trying to simply output that indifidual value, delayTime which I have stored in $tm is an integer, so I cannot figure out why I cannot output this value. Similarly if I simply try as a consequence: System.err.println($ mdo.delayTime); I get a similar error. What am I doing wrong? Thanks, Chris