When I add the Terrain Flattening module I get an error: Error in graph: [NodeId: Terrain-Correction] Operator ‘RangeDopplerGeocodingOp’: Mandatory source product (field ‘sourceProduct’) not set.
As you can see, Gamma0 is displayed as an input but obviously not recognized by the graph.
got it working by myself. Somehow, there was a .1 inserted in the sourceProduct tag when creating the xml-file. I removed it in the xml, saved and imported the graph again. Now it works. Maybe a bug?
The error message occured when I deleted a connection in the old graph (remove source) to insert the additional module TerrainFlattening. Could be that there went something wrong internally.
The problem re-occurs every time you insert a new module into an existing graph and place it between two connected modules, and remove the old link respectively.
This somehow adds the .1 in the source product tag in the XML file which makes the graph incomplete.
it can occur multiple times (whenever a new or intermediate product is read), so that is okay. What product is passed to the XML? Looks like the overall input for the graph (first occurence of <sourceProduct is invalid).