If a pipeline imports arguments from a contained task, not all of the arguments will have nodes built. If arguments are set that do not have pipeline nodes defined, check that the nodes are built.
Also, check that arguments from the tool that are listed as required in the tool configuration file have nodes built by default on initial construction.
If a pipeline imports arguments from a contained task, not all of the arguments will have nodes built. If arguments are set that do not have pipeline nodes defined, check that the nodes are built.