LinearToFromdB missing in Graph Builder?

Am I mistaken in not finding the LinearToFromdB Operator in the Graph Builder? It does not seem to be there …

I have to manually add it to my xml file … I need it since TerrainCorrection needs to be done on LinearValues. Or is there other ways?

I do (AppOrb)>Cal>Spk>TC>LindB


It should be under raster -> data conversion -> linearToFromdB in the graph builder