Getting input outside of SolveInstance OR getting input despite error/RuntimeMessageLevel?

Hi,

(This is a continuation of a single project, but because it's a separate issue, I thought it'd be best to separate it out into a new thread, to help for anyone searching for help in the future. If we'd rather limited posts to the same thread, please let me know.)

Based on a previous discussion, I've created a button that dynamically changes the number of input/output parameters in a comp..., as part of a meta-component project.

However, I need the button to be clickable and to process an input (a file URL) when the component has a warning raised. Specifically, I need the button to be clickable when the components' inputs are not all plugged in. At the same time, I don't want to make the inputs optional, so I don't want to disable the warnings themselves. 

I'm running into a situation where I need the new file URL to process input after the button click. However, I can't read the new file URL input in SolveInstance() since the component requires all inputs to be plugged in. 

As a workaround, I have thought about making all the inputs optional, then manually triggering an AddRuntimeMessage warning within SolveInstance, so that the URL input is retrieved, yet a warning message is still triggered. This seems somehow messy and a possible slowdown, since it's in SolveInstance.

I'd rather be able to retrieve that one input parameter's value upon mouse click. Is this possible? I'm not sure how to get access to the IGH_DataAccess object otherwise.

My component code is here: https://github.com/provolot/GrasshopperExchange/blob/master/Hairwor...

Thanks again!