What action should a developer perform to pass a DataTable from one workflow to another in UiPath?

Passing a DataTable from one workflow to another in UiPath is efficiently managed by declaring an "in" argument in the target workflow. This allows the developer to specify that the DataTable is being inputted into the workflow, creating a structured way to handle data transfer.

By establishing an "in" argument, the target workflow can receive the DataTable from the calling workflow seamlessly. This method promotes reusability and modular design in the automation process, as the workflows remain independent yet can share necessary information when required.

In contrast, creating a global variable in the project can lead to unforeseen issues, as global variables can be accessed and potentially modified from any part of the project, leading to difficulties in debugging and managing state. Similarly, using the Invoke Method activity instead of Invoke Workflow does not directly support the passing of complex data types like DataTables in the way that "in" arguments do. Lastly, setting the DataTable as a public variable in the main workflow could expose it to unnecessary modifications from other parts of the project, reducing encapsulation and thus the integrity of data management within workflows.