diff --git a/stix/lib/Makefile.am b/stix/lib/Makefile.am
index 96ae6c5..ed76fad 100644
--- a/stix/lib/Makefile.am
+++ b/stix/lib/Makefile.am
@@ -85,17 +85,17 @@ LIBADD_MOD_COMMON = -lstix
 
 pkgmodexecdir = $(libdir)
 
-pkgmodexec_LTLIBRARIES = libstix-snd.la #libstix-con.la
+pkgmodexec_LTLIBRARIES = libstix-snd.la libstix-con.la
 
 libstix_snd_la_SOURCES = mod-snd.c mod-snd.h
 libstix_snd_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
 libstix_snd_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
 libstix_snd_la_LIBADD = $(LIBADD_MOD_COMMON)
 
-#libstix_con_la_SOURCES = mod-con.c mod-con.h
-#libstix_con_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
-#libstix_con_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
-#libstix_con_la_LIBADD = $(LIBADD_MOD_COMMON)
+libstix_con_la_SOURCES = mod-con.c mod-con.h
+libstix_con_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
+libstix_con_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
+libstix_con_la_LIBADD = $(LIBADD_MOD_COMMON)
 
 endif
 
diff --git a/stix/lib/Makefile.in b/stix/lib/Makefile.in
index 40fa492..b4ea68d 100644
--- a/stix/lib/Makefile.in
+++ b/stix/lib/Makefile.in
@@ -133,16 +133,28 @@ am__installdirs = "$(DESTDIR)$(pkglibdir)" \
 	"$(DESTDIR)$(pkgincludedir)"
 LTLIBRARIES = $(pkglib_LTLIBRARIES) $(pkgmodexec_LTLIBRARIES)
 am__DEPENDENCIES_1 =
+@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_DEPENDENCIES =  \
+@ENABLE_STATIC_MODULE_FALSE@	$(am__DEPENDENCIES_1)
+am__libstix_con_la_SOURCES_DIST = mod-con.c mod-con.h
+@ENABLE_STATIC_MODULE_FALSE@am_libstix_con_la_OBJECTS =  \
+@ENABLE_STATIC_MODULE_FALSE@	libstix_con_la-mod-con.lo
+libstix_con_la_OBJECTS = $(am_libstix_con_la_OBJECTS)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
+libstix_con_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
+	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+	$(AM_CFLAGS) $(CFLAGS) $(libstix_con_la_LDFLAGS) $(LDFLAGS) -o \
+	$@
+@ENABLE_STATIC_MODULE_FALSE@am_libstix_con_la_rpath = -rpath \
+@ENABLE_STATIC_MODULE_FALSE@	$(pkgmodexecdir)
 @ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_DEPENDENCIES =  \
 @ENABLE_STATIC_MODULE_FALSE@	$(am__DEPENDENCIES_1)
 am__libstix_snd_la_SOURCES_DIST = mod-snd.c mod-snd.h
 @ENABLE_STATIC_MODULE_FALSE@am_libstix_snd_la_OBJECTS =  \
 @ENABLE_STATIC_MODULE_FALSE@	libstix_snd_la-mod-snd.lo
 libstix_snd_la_OBJECTS = $(am_libstix_snd_la_OBJECTS)
-AM_V_lt = $(am__v_lt_@AM_V@)
-am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
-am__v_lt_0 = --silent
-am__v_lt_1 = 
 libstix_snd_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
 	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
 	$(AM_CFLAGS) $(CFLAGS) $(libstix_snd_la_LDFLAGS) $(LDFLAGS) -o \
@@ -202,10 +214,11 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
-SOURCES = $(libstix_snd_la_SOURCES) $(libstix_la_SOURCES) \
-	$(stix_SOURCES)
-DIST_SOURCES = $(am__libstix_snd_la_SOURCES_DIST) \
+SOURCES = $(libstix_con_la_SOURCES) $(libstix_snd_la_SOURCES) \
 	$(libstix_la_SOURCES) $(stix_SOURCES)
+DIST_SOURCES = $(am__libstix_con_la_SOURCES_DIST) \
+	$(am__libstix_snd_la_SOURCES_DIST) $(libstix_la_SOURCES) \
+	$(stix_SOURCES)
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -460,11 +473,15 @@ stix_LDADD = $(LIBADD_LIB_COMMON) -lstix #-ldyncall_s
 @ENABLE_STATIC_MODULE_FALSE@LDFLAGS_MOD_COMMON = $(LDFLAGS_LIB_COMMON)
 @ENABLE_STATIC_MODULE_FALSE@LIBADD_MOD_COMMON = -lstix
 @ENABLE_STATIC_MODULE_FALSE@pkgmodexecdir = $(libdir)
-@ENABLE_STATIC_MODULE_FALSE@pkgmodexec_LTLIBRARIES = libstix-snd.la #libstix-con.la
+@ENABLE_STATIC_MODULE_FALSE@pkgmodexec_LTLIBRARIES = libstix-snd.la libstix-con.la
 @ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_SOURCES = mod-snd.c mod-snd.h
 @ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
 @ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
 @ENABLE_STATIC_MODULE_FALSE@libstix_snd_la_LIBADD = $(LIBADD_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_SOURCES = mod-con.c mod-con.h
+@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
+@ENABLE_STATIC_MODULE_FALSE@libstix_con_la_LIBADD = $(LIBADD_MOD_COMMON)
 all: stix-cfg.h
 	$(MAKE) $(AM_MAKEFLAGS) all-am
 
@@ -586,6 +603,9 @@ clean-pkgmodexecLTLIBRARIES:
 	  rm -f $${locs}; \
 	}
 
+libstix-con.la: $(libstix_con_la_OBJECTS) $(libstix_con_la_DEPENDENCIES) $(EXTRA_libstix_con_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libstix_con_la_LINK) $(am_libstix_con_la_rpath) $(libstix_con_la_OBJECTS) $(libstix_con_la_LIBADD) $(LIBS)
+
 libstix-snd.la: $(libstix_snd_la_OBJECTS) $(libstix_snd_la_DEPENDENCIES) $(EXTRA_libstix_snd_la_DEPENDENCIES) 
 	$(AM_V_CCLD)$(libstix_snd_la_LINK) $(am_libstix_snd_la_rpath) $(libstix_snd_la_OBJECTS) $(libstix_snd_la_LIBADD) $(LIBS)
 
@@ -651,6 +671,7 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_con_la-mod-con.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-bigint.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-comp.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libstix_la-debug.Plo@am__quote@
@@ -695,6 +716,13 @@ distclean-compile:
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
 
+libstix_con_la-mod-con.lo: mod-con.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_con_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_con_la-mod-con.lo -MD -MP -MF $(DEPDIR)/libstix_con_la-mod-con.Tpo -c -o libstix_con_la-mod-con.lo `test -f 'mod-con.c' || echo '$(srcdir)/'`mod-con.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_con_la-mod-con.Tpo $(DEPDIR)/libstix_con_la-mod-con.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='mod-con.c' object='libstix_con_la-mod-con.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_con_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libstix_con_la-mod-con.lo `test -f 'mod-con.c' || echo '$(srcdir)/'`mod-con.c
+
 libstix_snd_la-mod-snd.lo: mod-snd.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libstix_snd_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libstix_snd_la-mod-snd.lo -MD -MP -MF $(DEPDIR)/libstix_snd_la-mod-snd.Tpo -c -o libstix_snd_la-mod-snd.lo `test -f 'mod-snd.c' || echo '$(srcdir)/'`mod-snd.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libstix_snd_la-mod-snd.Tpo $(DEPDIR)/libstix_snd_la-mod-snd.Plo
@@ -1080,11 +1108,6 @@ uninstall-am: uninstall-binPROGRAMS uninstall-pkgincludeHEADERS \
 	uninstall-pkglibLTLIBRARIES uninstall-pkgmodexecLTLIBRARIES
 
 
-#libstix_con_la_SOURCES = mod-con.c mod-con.h
-#libstix_con_la_CPPFLAGS = $(CPPFLAGS_MOD_COMMON)
-#libstix_con_la_LDFLAGS = $(LDFLAGS_MOD_COMMON)
-#libstix_con_la_LIBADD = $(LIBADD_MOD_COMMON)
-
 install-data-hook:
 	@echo "#ifndef _STIX_CFG_H_" > "$(DESTDIR)$(pkgincludedir)/stix-cfg.h"
 	@echo "#define _STIX_CFG_H_" >> "$(DESTDIR)$(pkgincludedir)/stix-cfg.h"
diff --git a/stix/lib/exec.c b/stix/lib/exec.c
index e75dccd..6b72374 100644
--- a/stix/lib/exec.c
+++ b/stix/lib/exec.c
@@ -1163,7 +1163,7 @@ static int prim_dump (stix_t* stix, stix_ooi_t nargs)
 		stix_logbfmt (stix, 0, "ARGUMENT %zd: %O\n", i, STIX_STACK_GET(stix, stix->sp - i));
 	}
 
-	STIX_STACK_POPS (stix, nargs); /* leave the receiver as a return value */
+	STIX_STACK_SETRETTORCV (stix, nargs); /* ^self */
 	return 1; /* success */
 }
 
@@ -1268,7 +1268,7 @@ static int prim_log (stix_t* stix, stix_ooi_t nargs)
 		}
 	}
 
-	STIX_STACK_POPS (stix, nargs); /* delete arguments, keep self */
+	STIX_STACK_SETRETTORCV (stix, nargs); /* ^self */
 	return 1;
 }
 
@@ -1283,8 +1283,7 @@ static int prim_identical (stix_t* stix, stix_ooi_t nargs)
 
 	b = (rcv == arg)? stix->_true: stix->_false;
 
-	STIX_STACK_POP (stix);
-	STIX_STACK_SETTOP (stix, b);
+	STIX_STACK_SETRET (stix, nargs, b);
 	return 1;
 }
 
@@ -1299,8 +1298,7 @@ static int prim_not_identical (stix_t* stix, stix_ooi_t nargs)
 
 	b = (rcv != arg)? stix->_true: stix->_false;
 
-	STIX_STACK_POP (stix);
-	STIX_STACK_SETTOP (stix, b);
+	STIX_STACK_SETRET (stix, nargs, b);
 	return 1;
 }
 
@@ -1309,9 +1307,11 @@ static int prim_class (stix_t* stix, stix_ooi_t nargs)
 	stix_oop_t rcv, c;
 
 	STIX_ASSERT (nargs ==  0);
+
 	rcv = STIX_STACK_GETRCV(stix, nargs);
 	c = STIX_CLASSOF(stix, rcv);
-	STIX_STACK_SETTOP (stix, c);
+
+	STIX_STACK_SETRET (stix, nargs, c);
 	return 1; /* success */
 }
 
@@ -1331,8 +1331,7 @@ static int prim_basic_new (stix_t* stix, stix_ooi_t nargs)
 	obj = stix_instantiate (stix, rcv, STIX_NULL, 0);
 	if (!obj) return -1;
 
-	/* emulate 'pop receiver' and 'push result' */
-	STIX_STACK_SETTOP (stix, obj);
+	STIX_STACK_SETRET (stix, nargs, obj);
 	return 1; /* success */
 }
 
@@ -1957,8 +1956,7 @@ static int prim_processor_add_timed_semaphore (stix_t* stix, stix_ooi_t nargs)
 
 		/*
 		Is this more desired???
-		STIX_STACK_POPS (stix, nargs);
-		STIX_STACK_SETTOP (stix, stix->_false);
+		STIX_STACK_SETRET (stix, nargs, stix->_false);
 		return 1;
 		*/
 	}
@@ -1984,7 +1982,7 @@ static int prim_processor_add_timed_semaphore (stix_t* stix, stix_ooi_t nargs)
 
 	if (add_to_sem_heap (stix, sem) <= -1) return -1;
 
-	STIX_STACK_POPS (stix, nargs); /* remove all arguments, ^self */
+	STIX_STACK_SETRETTORCV (stix, nargs); /* ^self */
 	return 1;
 }
 
@@ -2014,7 +2012,7 @@ static int prim_processor_remove_semaphore (stix_t* stix, stix_ooi_t nargs)
 		STIX_ASSERT(sem->heap_index == STIX_SMOOI_TO_OOP(-1));
 	}
 
-	STIX_STACK_POPS (stix, nargs); /* keep the receiver in the stack. ^self */
+	STIX_STACK_SETRETTORCV (stix, nargs); /* ^self */
 	return 1;
 }
 
@@ -2667,9 +2665,8 @@ STIX_DEBUG0 (stix, "wrong function name...\n");
 		return 0;
 	}
 
-	STIX_STACK_POPS (stix, 2);
 /* TODO: how to hold an address? as an integer????  or a byte array? */
-	STIX_STACK_SETTOP (stix, STIX_SMOOI_TO_OOP(sym));
+	STIX_STACK_SETRET (stix, nargs, STIX_SMOOI_TO_OOP(sym));
 
 	return 1;
 }
@@ -3109,9 +3106,9 @@ static int send_message (stix_t* stix, stix_oop_char_t selector, int to_super, s
 		}
 		else
 		{
-			/* manipulate the stack as if 'receier doesNotUnderstand: select' 
+			/* manipulate the stack as if 'receier doesNotUnderstand: selector' 
 			 * has been called. */
-/* TODO: if i manipulate the stack this way here, the stack track for the last call is kind of lost.
+/* TODO: if i manipulate the stack this way here, the stack trace for the last call is kind of lost.
  *       how can i preserve it gracefully? */
 			STIX_STACK_POPS (stix, nargs);
 			nargs = 1;
diff --git a/stix/lib/stix.h b/stix/lib/stix.h
index de55fd6..25e14b1 100644
--- a/stix/lib/stix.h
+++ b/stix/lib/stix.h
@@ -908,7 +908,7 @@ struct stix_t
 /* you can't access arguments and receiver after this macro. 
  * also you must not call this macro more than once */
 #define STIX_STACK_SETRET(stix,nargs,retv) (STIX_STACK_POPS(stix, nargs), STIX_STACK_SETTOP(stix, retv))
-
+#define STIX_STACK_SETRETTORCV(stix,nargs) (STIX_STACK_POPS(stix, nargs))
 /* =========================================================================
  * STIX VM LOGGING
  * ========================================================================= */