selection help - NOOB

Hi I am hoping that this is simple and I can get help.

I am new to maxscript, (but not to max)

basicaly i am working on an export script for my current project, and i am 
getting an error

I am trying to go thru each object, center it, delete the rest and save it 
out as it's own file (export will come later) I have NO trouble with the 
string creation for the file name, i get an error when I tell it to selec 
the object to affect.

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This is my code:

for z = 1 to $objects.count do (
    ----- create string for file location
    save2folder = master_folder + objname_array[z]
    save2file = save2folder + add_folder + objname_array[z] + dotmax
    ------ select each object, delete the rest, center it, and save it out 
as it's own file
    select $objname_array[z]
    select invert
    delete
    $objname_array[z].position = [0,0,0]
    saveMaxfile save2file quiet:true
    fetchMaxFile quiet:true
   )

--------------------------------------------
this is the error I get:
>> MAXScript FileIn Exception: -- No ""get"" function
for undefined <<
and it selects the line that starts with "select $objname_array[z]

please help