SYMPTOM:
When using an Edit Links hyperlink defined on a textbox to pass prompt answers dynamically to an attribute element list in Strategy Web 9.4.1, only one element is passed instead of all selected. In the example below, a checkbox selector has three elements selected and is targeting a textbox with a link defined.

Note that after the link is used, only a single element is passed and displayed in the grid in the target document, as shown below:

CAUSE:
This is a limitation in Strategy Web 9.4.1. An textbox can only dynamically render a single attribute element at a time. This is also explained in tech note KB235590. Since the textbox can only hold one element at a time, only one of the elements is passed on to the Edit Link to answer the prompt.
ACTION:
Use a grid instead of a textbox as the linking mechanism, as noted in tech note KB39841. Or switch to URL API, as per tech note KB224592.