diff --git a/stlc.rkt b/stlc.rkt
index 6c2d49d..3039487 100644
--- a/stlc.rkt
+++ b/stlc.rkt
@@ -78,8 +78,6 @@
     [(_ . b:boolean) (⊢ (syntax/loc stx (#%datum . b)) #'Bool)]
     [(_ x) 
      #:when (type-error #:src #'x #:msg "~a has unknown type" #'x)
-            #;(error 'TYPE-ERROR "~a (~a:~a) has unknown type" 
-                     #'x (syntax-line #'x) (syntax-column #'x))
      (syntax/loc stx (#%datum . x))]))
 
 (define-syntax (begin/tc stx)
@@ -170,12 +168,7 @@
                 (type-error #:src stx 
                             #:msg "IF branches have differing types: branch ~a has type ~a and branch ~a has type ~a"
                             #'e1 (typeof #'e1+)
-                            #'e2 (typeof #'e2+))
-                #;(error 'TYPE-ERROR 
-                       "(~a:~a) if branches have differing types: ~a has type ~a and ~a has type ~a"
-                       (syntax-line stx) (syntax-column stx)
-                       (syntax->datum #'e1) (typeof #'e1+)
-                       (syntax->datum #'e2) (typeof #'e2+)))
+                            #'e2 (typeof #'e2+)))
      (⊢ (syntax/loc stx (if e_test+ e1+ e2+)) (typeof #'e1+))]))
 
 ;; lists ----------------------------------------------------------------------
diff --git a/typecheck.rkt b/typecheck.rkt
index dd45ba8..3c40935 100644
--- a/typecheck.rkt
+++ b/typecheck.rkt
@@ -39,12 +39,7 @@
 ;  (printf "~a has type ~a; expected: ~a\n" (syntax->datum e) (syntax->datum (typeof e)) (syntax->datum τ))
   (or (type=? (typeof e) τ)
       (type-error #:src e 
-                  #:msg "~a has type ~a, but should have type ~a" e (typeof e) τ)
-      #;(error 'TYPE-ERROR "~a (~a:~a) has type ~a, but should have type ~a"
-             (syntax->datum e)
-             (syntax-line e) (syntax-column e)
-             (syntax->datum (typeof e))
-             (syntax->datum τ))))
+                  #:msg "~a has type ~a, but should have type ~a" e (typeof e) τ)))
 
 ;; attaches type τ to e (as syntax property)
 (define-for-syntax (⊢ e τ) (syntax-property e 'type τ))
@@ -67,8 +62,7 @@
     (hash-ref (Γ) (syntax->datum x)
               (λ () 
                 (type-error #:src x
-                            #:msg "Could not find type for variable ~a" x)
-                #;(error 'TYPE-ERROR "Could not find type for variable ~a." (syntax->datum x)))))
+                            #:msg "Could not find type for variable ~a" x))))
 
   ;; returns a new hash table extended with type associations x:τs
   (define (type-env-extend x:τs)