created an attachment (id=158270)
report design

description:
  invalid expression exception was thrown out while previewing report contains xtab.

test build:
birt2.5.2 v20100205-0930

step to reproduce:

1. use the report attached
2. preview it in web viewer

error log:
error evaluating javascript expression. script engine error: the level member cannot be achieved because the result set has not started.
script source: , line: 0, text:
data["city"]
   at org.eclipse.birt.data.engine.core.dataexception.wrap(dataexception.java:118)
   at org.eclipse.birt.data.engine.script.scriptevalutil.evaluatejsasexpr(scriptevalutil.java:773)
   at org.eclipse.birt.data.engine.script.scriptevalutil.evalexpr(scriptevalutil.java:720)
   at org.eclipse.birt.data.engine.script.scriptevalutil.evalexpr(scriptevalutil.java:661)
fix it now.
verified and closed