Bug 200979 BIRT Cross tab - Better error messages
In general the error messages are very generic - either "Cube does not exist" followed by stack trace or - stack trace. From the error message it is difficult to fix the problem in the report design. I have attached a couple of report design, in which case the error messages are so difficult to follow. We need to show user friendly error messages. ( This bug applies to data engine errors and engine errors ).
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/impl/facttable/FactTableAccessor.java
{
	String dimensionName;
	int dimensionLength;
}
class CombinedPositionContructor
{
	private DimensionDivision[] subDimensions;
	private int[] dimensionBitLength;
	private int totalBitLength;
	CombinedPositionContructor( DimensionDivision[] subDimensions )
	{
		this.subDimensions = subDimensions;
		calculateBitLength( subDimensions );
	}
	private void calculateBitLength( DimensionDivision[] dimensionDivision )
	{
		int maxRange;
		dimensionBitLength = new int[dimensionDivision.length];
		for ( int i = 0; i < dimensionDivision.length; i++ )
		{
			IntRange[] ranges = dimensionDivision[i].getRanges();