Adding a non-scalar parameter to a trajectory raises an error if we size it with "shape", but works successfully with "val".

[Kenneth-T-Moore]

Issue Type

• Bug
• Enhancement
• Docs
• Miscellaneous

Description

I have a static parameter that has a vector size in an ODE. I use add_parameter to allow the value to be accessed at the top of the model. If I add the parameter with val=val, it works, but if I use shape=shape, where the shape is val.shape, I get a size mismatch error:

builtins.ValueError: 'traj.phases.phase0' <class Phase>: The source and target shapes do not match or are ambiguous for the connection 'traj.phases.phase0.param_comp.parameter_vals:aircraft:wing:sweep_distribution' to 'traj.phases.phase0.rhs_disc.p1.aircraft:wing:sweep_distribution'. The source shape is (1,) but the target shape is (3,).

Example included.

Example

https://gist.github.com/Kenneth-T-Moore/47c9329d506918463bbe7eacc2de5dea

Environment

Operating System: <i.e. OS X 10.14.6, Windows 10, Ubuntu 16.04>
Python environment: <i.e. Anaconda Python 3.7.1>
Packages: <versions of Dymos, OpenMDAO, and other pertinent Python packages. You can just paste the output of pip freeze here.>