incorrect syntax with script expression

[agaldemas]

I've tried to use a script expression in a rule, using two proposed esper syntax, but both are seen with incorrect syntax by perseo-core esper engine:
time=2018-03-14T13:13:15.842Z | lvl=ERROR | corr=n/a | trans=n/a | op=refreshCore | comp=perseo-fe | srv=n/a | subsrv=n/a | msg=[object Object] error put to http://perseo-core:8080/perseo-core/rules (Incorrect syntax near 'expression' at line 1 column 35 [context ctxt$testservice$testalain expression String js:trunc(name)[trunc(name); function trunc(n) {return n.substr(n.indexOf(":" + 1));}] select *,"my_rule_update_tto" as ruleName, *,cast(cast(ev.temperature?, String),float) + 1.0 as temp, trunc(cast(ev.id?, String)) as iddev from pattern [every ev=iotEvent(cast(cast(temperature?,String),float)<5.0 and type="thing")]])

time=2018-03-14T13:23:15.875Z | lvl=ERROR | corr=n/a | trans=n/a | op=refreshCore | comp=perseo-fe | srv=n/a | subsrv=n/a | msg=[object Object] error put to http://perseo-core:8080/perseo-core/rules (Incorrect syntax near 'expression' at line 1 column 35 [context ctxt$testservice$testalain expression String js:trunc(name)[name.substr(name.indexOf(":" + 1));] select *,"my_rule_update_tto" as ruleName, *,cast(cast(ev.temperature?, String),float) + 1.0 as temp, trunc(cast(ev.id?, String)) as iddev from pattern [every ev=iotEvent(cast(cast(temperature?,String),float)<5.0 and type="thing")]])

the used esper version (5.5.0) support script expression, any idea of the issue with the syntax ?
or is it a script expression support issue ?

Thanks in advance for help or feedback on this problem

[fgalan]

I'd suggest you to do an isolated test using just Esper in a small testing Java program, based in the same version (5.5.0) in order to see if the problem is related with Perseo or with Esper itself.