instantiate: unknown module
  module name: #<resolved-module-path:(submod "C:\Users\rob\racket_scripts\onesto
pshopping.rkt" #%contract-defs-reference)>
  context...:
   namespace-module-instantiate!96
   for-loop
   [repeats 1 more time]
   run-module-instance!125
   perform-require!78
   for-loop
   [repeats 1 more time]
   finish
   pass-1-and-2-loop
   module-begin-k
   expand-module16
   expand-capturing-lifts
   temp118_0
   C:\Program Files\Racket-7.2.0.5\collects\compiler\embed.rkt:424:0: get-code
   C:\Program Files\Racket-7.2.0.5\collects\racket\private\map.rkt:269:4: loop
   C:\Program Files\Racket-7.2.0.5\collects\compiler\embed.rkt:1133:0: do-write-
module-bundle
   ...

load-handler: expected a `module' declaration for `pasterack' in "paste 90931", but found something else

Check that paste includes #lang?