Sdo_geor.mosaic ends with ORA-06531

Question

I'm using Oracle 11g R1, and try the enhanced mosaic function, but i always get this error.
ORA-06531: Reference to uninitialized collection
The SQL:
DECLARE
gr sdo_georaster;
BEGIN
INSERT INTO LGVHH05 (id, georaster) VALUES (1, sdo_geor.init('LGVHH05_RDT')) RETURNING georaster INTO gr;
sdo_geor.mosaic('LGVHH05_TILE', 'GEORASTER', gr, 'blocksize=(1024,1024,3)');
UPDATE LGVHH05 SET georaster=gr WHERE id=1;
END;
I'm wondering what collection this could be?
The GeoRaster objects are valid and have the same SRID.

Answer 1

thanks so far, here is the metadata:
GEORASTER.METADATA
<georasterMetadata xmlns="http://xmlns.oracle.com/spatial/georaster">
<objectInfo>
<rasterType>21001</rasterType>
<isBlank>false</isBlank>
<defaultRed>1</defaultRed>
<defaultGreen>2</defaultGreen>
<defaultBlue>3</defaultBlue>
</objectInfo>
<rasterInfo>
<cellRepresentation>UNDEFINED</cellRepresentation>
<cellDepth>8BIT_U</cellDepth>
<totalDimensions>3</totalDimensions>
<dimensionSize type="ROW">
<size>4001</size>
</dimensionSize>
<dimensionSize type="COLUMN">
<size>4001</size>
</dimensionSize>
<dimensionSize type="BAND">
<size>3</size>
</dimensionSize>
<ULTCoordinate>
<row>0</row>
<column>0</column>
<band>0</band>
</ULTCoordinate>
<blocking>
<type>REGULAR</type>
<totalRowBlocks>16</totalRowBlocks>
<totalColumnBlocks>16</totalColumnBlocks>
<rowBlockSize>256</rowBlockSize>
<columnBlockSize>256</columnBlockSize>
</blocking>
<interleaving>BIP</interleaving>
<pyramid>
<type>NONE</type>
</pyramid>
<compression>
<type>NONE</type>
</compression>
</rasterInfo>
<spatialReferenceInfo>
<isReferenced>true</isReferenced>
<isRectified>true</isRectified>
<SRID>31467</SRID>
<spatialResolution dimensionType="X">
<resolution>0.5</resolution>
</spatialResolution>
<spatialResolution dimensionType="Y">
<resolution>0.5</resolution>
</spatialResolution>
<modelCoordinateLocation>CENTER</modelCoordinateLocation>
<modelType>FunctionalFitting</modelType>
<polynomialModel rowOff="0.0" columnOff="0.0" xOff="0.0" yOff="0.0" zOff="0" rowScale="1.0" columnScale="1.0" xScale="1.0" yScale="1.0" zScale="1.0">
<pPolynomial pType="1" nVars="2" order="1" nCoefficients="3">
<polynomialCoefficients>1.1852E7 0.0 -2.0</polynomialCoefficients>
</pPolynomial>
<qPolynomial pType="1" nVars="0" order="0" nCoefficients="1">
<polynomialCoefficients>1.0</polynomialCoefficients>
</qPolynomial>
<rPolynomial pType="1" nVars="2" order="1" nCoefficients="3">
<polynomialCoefficients>-7104000.0 2.0 0.0</polynomialCoefficients>
</rPolynomial>
<sPolynomial pType="1" nVars="0" order="0" nCoefficients="1">
<polynomialCoefficients>1.0</polynomialCoefficients>
</sPolynomial>
</polynomialModel>
</spatialReferenceInfo>
<layerInfo>
<layerDimension>BAND</layerDimension>
</layerInfo>
</georasterMetadata>