[Closed] Need help : 3Dmax Custom Attribute, –Unknown Property–

I ‘ve download a rigged model and when I opened the file I found this pop up

–Unknown Property– “Attribute Holder” in $Editable_Spline:Generi_handCTRL @ [-19.2626 ,1.66666,31.807]

The below is the note from the file

– Wrap this in a cA.get to make sure we have CA’s now.

– Otherwise on a load or merge, 3dsMAX might try to execute

– this before the CA’s get loaded in! This way it waits until

– everything is fully loaded before -really- calculating.

myD = custAttributes.get $‘Generi_handRCTRL’.Attribute_Holder 1;

if (myD != undefined) then

(

dependsOn $Generi_handRCTRL $Generi_armStartRINT ;

d = distance $‘Generi_armRIKEndEffector’.pos $Generi_upArmRBONE.pos;

st = (d – 14.5588); – Length of joints extended

orig = 4.97759; – original bone pos

if (st < 0) then – cap at 0 since if we “squashed” the leg

st = 0;    -- it would never actually bend

m = $Generi_handRCTRL.Attribute_Holder.maxstretch;

if (st > m) then – cap stretch at max val as set by slider

st = m;

st = st + $Generi_handRCTRL.Attribute_Holder.extrastretch;

p = orig + (st/2*4/4);

)

else

4.97759; 

– End of script

this is the screen shot : /][IMG]

Since I’m new I have no idea about it at all. Thank you very much.