Bug 201030 NPE throws out when preview the attached report design
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/ScriptEvalUtil.java
scope ) );
			}
			else
			{
				ConditionalExpression conditionalExpr = (ConditionalExpression) expr;
				Object expression = evalExpr( conditionalExpr.getExpression( ),
						cx,
						scope,
						source,
						lineNo );
				if ( conditionalExpr.getOperand1( ) instanceof ICombinedExpression )
				{
					ICombinedExpression combinedExpr = (ICombinedExpression) ( (IConditionalExpression) expr ).getOperand1( );
					Object[] opValues = new Object[combinedExpr.getExpressions( ).length];
					for ( int i = 0; i < opValues.length; i++ )
					{
						opValues[i] = evalExpr( combinedExpr.getExpressions( )[i],
								cx,
								scope,
								source,
								lineNo );
					}
					result = evalConditionalExpr( expression,
							conditionalExpr.getOperator( ),
							opValues );
				}
				else
				{
					Object Op1 = evalExpr( MiscUtil.constructValidScriptExpression( (IScriptExpression) conditionalExpr.getOperand1( ) ),
							cx,