Bug 142091 Cannot group rows using row["__rowNum"]
See attached report. The report is a simple listing report, and I want to insert a page break after every 10 rows. To accomplish this, I create a group which groups on row["__rowNum"], then set the interval to 10. When I preview the report, it displays an error: Error0 : data.engine.InvalidGroupKey ( 1 time(s) ) detail : org.eclipse.birt.data.engine.core.DataException: Group key "rowCount" in group 1 cannot depend on column bindings defined in the group lower than itself. ... I tried defining the data binding at the table and the group level. Both methods return the same error.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/expression/ExpressionCompilerUtil.java
{
	private static ExpressionCompiler expressionCompiler = new ExpressionCompiler( );
	/**
	 * @param expr
	 * @param registry
	 * @param cx
	 * @return
	 */
	public static CompiledExpression compile( String expr, Context cx )
	{
		return expressionCompiler.compile( expr, null, cx );
	}
	/**
	 * 
	 * @param name
	 * @param exprManager