pattern-index-query-example.scm sample does not work

[stellarspot]

Steps to reproduce

• Build and install pattern-index project
• go to opencog/pattern-index directory
• run guile pattern-index-query-example.scm
  Output:

;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;;       or pass the --no-auto-compile argument to disable.
;;; compiling /home/stellarspot/opencog/master/pattern-index/opencog/pattern-index/pattern-index-query-example.scm
;;; compiling /usr/share/guile/site/2.2/opencog/learning/pattern-index.scm
;;; WARNING: compilation of /usr/share/guile/site/2.2/opencog/learning/pattern-index.scm failed:
;;; In procedure mkstemp!: Permission denied
;;; WARNING: compilation of /home/stellarspot/opencog/master/pattern-index/opencog/pattern-index/pattern-index-query-example.scm failed:
;;; In procedure dynamic-link: file: "libpatternindex", message: "file not found"
Backtrace:
           4 (primitive-load "/home/stellarspot/opencog/master/patte…")
In ice-9/eval.scm:
   304:34  3 (_ #<directory (guile-user) 5643ab463140>)
   191:27  2 (_ #<directory (guile-user) 5643ab463140>)
   223:20  1 (proc #<directory (guile-user) 5643ab463140>)
In unknown file:
           0 (%resolve-variable (7 . pi-create-index) #<directory (g…>)

ERROR: In procedure %resolve-variable:
Unbound variable: pi-create-index