Terraview 3.3.1 does not export shape files when we have more than one representation (line, point, polygon) in the same layers. Shape files support only one representation at time.
Go to the te_representation table at Terralib and look at the layer_id Collumn. If it has more then one representation in the same layer, rename temporarily the layer_id data to another layer and export the watercomponent and waterline shape files. Then return the value it had before.
Terraview 4 does not have this problem anymore.