Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/script/instance/IRowInstance.java
package org.eclipse.birt.report.engine.api.script.instance;
import org.eclipse.birt.report.engine.api.script.IRowData;
public interface IRowInstance extends IReportElementInstance
{
	IScriptStyle getStyle( );
	/**
	 * @return the Bookmark value
	 */
	String getBookmarkValue( );
	/**
	 * @return the Bookmark value
	 */
	void setBookmark( String bookmark );
	/**
	 * @return Returns the height.
	 */
	String getHeight( );
	/**
	 * @return Returns the height.
	 */
	void setHeight( String height );
	/**
	 * Get the evaluated expressions for this row
	 * 
	 */
	IRowData getRowData( );
}