I got this error and the request to post this here...
>>> SCENE Info: <<<
Corona version: 1.7 (hotfix 4), build timestamp: Mar 23 2018 11:50:59
Converter version: 1.42
Max version: 18000
Installed Vray plugins: V_Ray_RT_3_60_03 V_Ray_Adv_3_60_03
# Material conversion took 8.025 seconds
# Iterations: 188, converted: 190
# Map conversion took 1.143 seconds
# Iterations: 172, converted: 172
# Light conversion took 14.078 seconds
# Iterations: 58
Error occured in TargetDirectionallight : $Target_Directional_Light:Direct01 @ [608313.500000,-206687.796875,196261.968750]
-- Unknown property: "AreaShadow" in $Target_Directional_Light:Direct01 @ [608313.500000,-206687.796875,196261.968750]
Error occured in Omnilight : $Omni_Light:Omni04 @ [-3005.970215,-2684.351074,179.892059]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni04 @ [-3005.970215,-2684.351074,179.892059]
Error occured in Omnilight : $Omni_Light:Omni05 @ [-3005.970215,526.738281,179.892059]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni05 @ [-3005.970215,526.738281,179.892059]
Error occured in Omnilight : $Omni_Light:Omni06 @ [-3005.970215,3737.827637,179.892059]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni06 @ [-3005.970215,3737.827637,179.892059]
Error occured in Omnilight : $Omni_Light:Omni07 @ [-3005.970215,8309.910156,179.892059]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni07 @ [-3005.970215,8309.910156,179.892059]
Error occured in Omnilight : $Omni_Light:Omni01 @ [-8881.720703,2267.581055,2666.993896]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni01 @ [-8881.720703,2267.581055,2666.993896]
Error occured in Omnilight : $Omni_Light:Omni08 @ [-10387.004883,2267.581055,2666.993896]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni08 @ [-10387.004883,2267.581055,2666.993896]
Error occured in Omnilight : $Omni_Light:Omni09 @ [-11878.650391,2267.581055,2666.993896]
-- Unknown property: "AreaShadow" in $Omni_Light:Omni09 @ [-11878.650391,2267.581055,2666.993896]