Bug 179661 NPE throws out when preview the attached report [1102]
Description: NPE throws out when preview the attached report [1102] Build number: 2.2.0.v20070328-0630 Steps to reproduce: 1, Using attached report design file 2, Preview Expected result: Previewed successfully Actual result: NPE throws out when preview Error log:
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/util/OlapExpressionUtil.java
{
	/**
	 * This method is used to get the level name that reference by a level
	 * reference expression of following format:
	 * dimension["dimensionName"]["levelName"].
	 * 
	 * String[0] dimensionName;
	 * String[1] levelName;
	 * @param expr
	 * @return String[]
	 */
	public static String[] getTargetLevel( String expr )
	{