Robot Framework, SikuliLibrary doesn' t work click region

Question

With a Library SikuliLibrary in Robot Framework, click Region It Works with image (${buttom_8})

${pref_coordinates}    Get Image Coordinates    ${buttom_8}
SikuliLibrary.Click Region   ${pref_coordinates}

But If I try without image doesn't work.

*** Variables ***
@{first_coordinates} Create List ${344} ${730}

*** Test Cases ***
tryy4

*** Keywords ***
tryy4
 Click Region @{first_coordinates}

what am I doing wrong? console error: java.lang.IllegalArgumentException: argument type mismatch

Answer 1

If you debug your image coordinates (region), you will see it returns a list with four elements: origin (x,y) and width (Lx,Ly):

${pref_coordinates}    Get Image Coordinates    ${buttom_8}
Log    ${pref_coordinates}

Here is an example taken from RIDE: