i get this message when i run script plz help me

[Memories.of.my.life]

[leeminardi]

Is Sum a variable assigned to an object parameter?  Alternatively, are you using "=" (assignment) where you should be using "==" (logical equivalence)?

[Memories.of.my.life]

i didn't do any think he was working before 
i didn't know what happen
do u know any solution for this

[leeminardi]

Please post the script and a file that uses it.

[Memories.of.my.life]

i just run this script Artakan_Create_Stairs_2_3_0 only nothing else 

[leeminardi]

Contact the vendor.

[Memories.of.my.life]

how can i connect with him