@{list1}= ObtainVariablesKeyword

@{userlist}= Create List ${uservariableA} ${uservariableB} ${uservariableC} ${uservariableD} ${uservariableE}

${A} ${B} ${C} ${D} ${E}= Run Keyword If @{list1}!=None Set Variable @{list1} ... ELSE Set Variable @{userlist}