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target_item 1 -post_node_result 0 0
target_value 1 -1.45083e-05 1.e-7
Here we check with target_item and target_value that the flux of groundflow to the left edge has the expected value. In case a new Tochnog release would have a bug, that will be automatically detected by running this tutorial if the real value at running the calculation differs from the expected value as set in target_item and target_value. When distributing a new release, we take care that tutorial calculations, and also other calculations, meet their expected values.