In the help for the node "External Tool (Labs)" it is specified: "Make sure that the process generates valid row IDs in order to ensure joining of the result with the input table. E.g. if the output is CSV, make sure that the first column contains the original row IDs of the input table."
1) Would it be possible to create a checkbox which would allow to remove the restriction according to which the first column should contain the original row IDs of the input table ?
2) Furthermore, would it be possible to make the input port optional ? Currently, as a way to circumvent this requirement, it is already possible to create an empty table with a single variable and no observation as input, then to specify the command line which does not even require the said input table and have a completely different output table.