can't display chart, and get following message in console.

INFO: The specified formula '

{assets,liabilities,equity}' contains an error. Expects Integer. when parsing {assets,liabilities,equity}

Mar 5, 2014 2:43:56 PM org.zkoss.zss.model.impl.sys.formula.FormulaEngineImpl parse
INFO: The specified formula '(Input!$J$15,Input!$J$21,Input!$J$22)' contains an error. Expects ')'. when parsing (Input!$J$15,Input!$J$21,Input!$J$22)