diff --git a/src/common/func.c b/src/common/func.c
index bad5f11..1e1e999 100644
--- a/src/common/func.c
+++ b/src/common/func.c
@@ -45,6 +45,7 @@ extern char *strdup(const char* s);
 #else
 #define CONST_PI ((double)3.14159265358979323846)
 #endif
+
 /*}}}*/
 
 #ifdef WIN32
@@ -304,6 +305,11 @@ static double deg2rad(double x)
 }
 /*}}}*/
 
+static void duperror(Token* tok, const char* erro) {
+  tok->type = EEK;
+  tok->u.err = strdup(erro);
+}
+
 typedef enum {ABSOLUTE, RELATIVE, EXCEL} LocConvention;
 
 static Token excel_adr_func(int argc, const Token argv[]);
@@ -340,12 +346,8 @@ static Token adr_func(int argc, const Token argv[], LocConvention lcon)
     else if (argv[i].type != EMPTY) break;
   }
   if (i < argc)
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: &([integer x][,[integer y][,[integer z]]])"))+1),_("Usage: &([integer x][,[integer y][,[integer z]]])"));
-  }
-  else 
-    result.type = LOCATION;
+    duperror(&result, _("Usage: &([integer x][,[integer y][,[integer z]]])"));
+  else result.type = LOCATION;
   return result;
 }
 /*}}}*/
@@ -408,16 +410,14 @@ static Token excel_adr_func(int argc, const Token argv[])
   Token result;
   char *usage = _("Usage: X&(THERE_LABEL, HERE_LABEL, [fix_x], [fix_y], [fix_z])");
   if (argc < 2) {
-    result.type = EEK;
-    result.u.err = strdup(usage);
+    duperror(&result, usage);
     return result;
   }
   if (argv[0].type == EEK) return argv[0];
   if (argv[1].type == EEK) return argv[1];
   if (argv[0].type != LOCATION || argv[1].type != LOCATION)
   {
-    result.type = EEK;
-    result.u.err = strdup(usage);
+    duperror(&result, usage);
     return result;
   }
 
@@ -432,8 +432,7 @@ static Token excel_adr_func(int argc, const Token argv[])
       if (argv[i].type == EEK) return argv[i];
       if (!INTPATIBLE(argv[i]))
       {
-	result.type = EEK;
-	result.u.err = strdup(usage);
+	duperror(&result, usage);
 	return result;
       }
       if (argv[i].type == INT && argv[i].u.integer > 0) fixed = true;
@@ -503,9 +502,7 @@ static Token bitwise_func(int argc, const Token argv[], LogicalFunction lop)
   for (size_t i = 0; i < argc; ++i) {
     if (!INTPATIBLE(argv[i]))
     {
-      result.type = EEK;
-      result.u.err =
-	strdup(_("Bitwise functions operate only on integers."));
+      duperror(&result, _("Bitwise functions operate only on integers."));
       return result;
     }
     int val = 0;
@@ -541,15 +538,11 @@ static Token e_func(int argc, const Token argv[])
     result.u.flt=CONST_E;
   }
   /*}}}*/
-  else /* result is e type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: e()"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: e()"));
   return result;
 }
 /*}}}*/
+
 /* eval */ /*{{{*/
 static Token eval_func(int argc, const Token argv[])
 {
@@ -558,13 +551,7 @@ static Token eval_func(int argc, const Token argv[])
   /*}}}*/
 
   --max_eval;
-  if (max_eval<0)
-  /* nesting error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("nested eval()"));
-  }
-  /*}}}*/
+  if (max_eval<0) duperror(&result, _("nested eval()"));
   else if (argc==1 && argv[0].type==LOCATION)
   /* evaluate expression in cell at given position */ /*{{{*/
   {
@@ -577,13 +564,7 @@ static Token eval_func(int argc, const Token argv[])
     else result=eval(contents);
   }
   /*}}}*/
-  else
-  /* eval type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: eval(location)"))+1),_("Usage: eval(location)"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: eval(location)"));
   ++max_eval;
   return result;
 }
@@ -599,15 +580,9 @@ static Token error_func(int argc, const Token argv[])
   /* asserts */ /*{{{*/
   assert(argv!=(Token*)0);
   /*}}}*/
-  result.type=EEK;
-  if (argc!=1 || argv[0].type!=STRING)
-  /* result is type error */ /*{{{*/
-  result.u.err=strcpy(malloc(strlen(_("Usage: error(string message)"))+1),_("Usage: error(string message)"));
-  /*}}}*/
-  else
-  /* result is user defined error */ /*{{{*/
-  result.u.err=strcpy(malloc(strlen(argv[0].u.string)+1),argv[0].u.string);
-  /*}}}*/
+  if (argc != 1 || argv[0].type != STRING)
+    duperror(&result, _("Usage: error(string message)"));
+  else duperror(&result, argv[0].u.string);
   return result;
 }
 /*}}}*/
@@ -673,22 +648,21 @@ static Token string_func(int argc, const Token argv[])
   }
   /*}}}*/
   else /* return string type error  */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: string(location) or string(float[,[integer][,integer]])"))+1),_("Usage: string(location) or string(float[,[integer][,integer]])"));
-    return result;
-  }
-  /*}}}*/
+    duperror(&result, _("Usage: string(location)|string(int)|string(float[,[int][,integer]])"));
   return result;
 }
 /*}}}*/
+
 /* sum */ /*{{{*/
 static Token sum_func(int argc, const Token argv[])
 {
-  /* variables */ /*{{{*/
   Token result;
-  /*}}}*/
+  const char *usage = _("Usage: sum(loc_start, loc_end)|sum(val1, val2,...)");
 
+  if (argc == 0) {
+    duperror(&result, usage);
+    return result;
+  }
   if (argc==2 && argv[0].type==LOCATION && argv[1].type==LOCATION) /* result is sum */ /*{{{*/
   {
     /* variables */ /*{{{*/
@@ -714,17 +688,22 @@ static Token sum_func(int argc, const Token argv[])
       result=tmp;
       if (result.type==EEK) return result;
     }
+  } else {
+    Token tmp;
+    /* Try to add up the args */
+    result = tcopy(argv[0]);
+    for (size_t i = 1; i < argc; ++i)
+    {
+      tmp = tadd(result, argv[i]);
+      tfree(&result);
+      result = tmp;
+      if (result.type == EEK) return result;
+    }
   }
-  /*}}}*/
-  else /* result is sum type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: sum(location,location)"))+1),_("Usage: sum(location,location)"));
-  }
-  /*}}}*/
   return result;
 }
 /*}}}*/
+
 /* n */ /*{{{*/
 static Token n_func(int argc, const Token argv[])
 {
@@ -759,13 +738,7 @@ static Token n_func(int argc, const Token argv[])
     result.u.integer = n;
   }
   /*}}}*/
-  else
-  /* result is n type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: n(location,location)"))+1),_("Usage: n(location,location)"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: n(location,location)"));
   return result;
 }
 /*}}}*/
@@ -813,29 +786,18 @@ static Token int_func(int argc, const Token argv[])
     
     errno=0;
     result.u.integer=strtol(argv[0].u.string,&s,10);
-    if (s==(char*)0 || *s)
-    {
-      result.type=EEK;
-      result.u.err=strdup(_("int(string): invalid string"));
-    }
-    else if (errno==ERANGE && (result.u.integer==LONG_MAX || result.u.integer==LONG_MIN))
-    {
-      result.type=EEK;
-      result.u.err=strdup(_("int(string): domain error"));
-    }
+    if (s==(char*)0 || *s) duperror(&result, _("int(string): invalid string"));
+    else if (errno==ERANGE &&
+	     (result.u.integer==LONG_MAX || result.u.integer==LONG_MIN))
+      duperror(&result, _("int(string): domain error"));
     else result.type=INT;
   }
   /*}}}*/
-  else
-  /* result is int type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: int(float[,integer,integer])"))+1),_("Usage: int(float[,integer,integer])"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: int(float[,integer,integer])"));
   return result;
 }
 /*}}}*/
+
 /* frac */ /*{{{*/
 static Token frac_func(int argc, const Token argv[])
 {
@@ -851,16 +813,11 @@ static Token frac_func(int argc, const Token argv[])
     result.u.flt=modf(argv[0].u.flt,&foo);
   }
   /*}}}*/
-  else
-  /* result is frac type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: frac(float)"))+1),_("Usage: frac(float)"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: frac(float)"));
   return result;
 }
 /*}}}*/
+
 /* len */ /*{{{*/
 static Token len_func(int argc, const Token argv[])
 {
@@ -875,13 +832,7 @@ static Token len_func(int argc, const Token argv[])
     result.u.integer=strlen(argv[0].u.string);
   }
   /*}}}*/
-  else
-  /* result is frac type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: len(string)"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: len(string)"));
   return result;
 }
 /*}}}*/
@@ -919,15 +870,11 @@ static Token log_func(int argc, const Token argv[])
     else result.u.flt=log(x)/log(y);
   }
   /*}}}*/
-  else /* result is log type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: log(float[,float])"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: log(float[,float])"));
   return result;
 }
 /*}}}*/
+
 /* minmax */ /*{{{*/
 static Token minmax_func(int argc, const Token argv[], int min)
 {
@@ -1005,15 +952,13 @@ static Token minmax_func(int argc, const Token argv[], int min)
     return argv[mini];
   }
   else
-  /* result is min/max type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(min ? _("Usage: min(location,location) or min(val1, val2,...)") : _("Usage: max(location,location) or max(val1,val2,...)"));
-    return result;
-  }
-  /*}}}*/
+    duperror(&result,
+	     min ? _("Usage: min(location,location) or min(val1, val2,...)")
+	         : _("Usage: max(location,location) or max(val1,val2,...)"));
+  return result;
 }
 /*}}}*/
+
 /* min */ /*{{{*/
 static Token min_func(int argc, const Token argv[])
 {
@@ -1047,13 +992,7 @@ static Token abs_func(int argc, const Token argv[])
     result.u.integer=(argv[0].u.integer<0 ? -argv[0].u.integer : argv[0].u.integer);
   }
   /*}}}*/
-  else
-  /* result is abs type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: abs(float|integer)"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: abs(float|integer)"));
   return result;
 }
 /*}}}*/
@@ -1072,14 +1011,11 @@ static Token env_func(int argc, const Token argv[])
     result.type=STRING;
     result.u.string=strdup(e);
   }
-  else
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: $(string)"));
-  }
+  else duperror(&result, _("Usage: $(string)"));
   return result;
 }
 /*}}}*/
+
 /* float */ /*{{{*/
 static Token float_func(int argc, const Token argv[])
 {
@@ -1090,28 +1026,18 @@ static Token float_func(int argc, const Token argv[])
   {
     char *p;
 
-    result.u.flt=strtod(argv[0].u.string,&p);
-    if (p!=argv[0].u.string && *p=='\0' && dblfinite(result.u.flt)==(const char*)0)
-    {
-      result.type=FLOAT;
-    }
-    else
-    {
-      result.type=EEK;
-      result.u.err=strdup(_("Not a (finite) floating point number"));
-    }
-  }
-  /*}}}*/
-  else
-  /* float type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: float(string)"));
+    result.u.flt = strtod(argv[0].u.string, &p);
+    if (p != argv[0].u.string && *p=='\0'
+	&& dblfinite(result.u.flt) == (const char*)0)
+      result.type = FLOAT;
+    else duperror(&result, _("Not a (finite) floating point number"));
   }
   /*}}}*/
+  else duperror(&result, _("Usage: float(string)"));
   return result;
 }
 /*}}}*/
+
 /* strftime */ /*{{{*/
 static Token strftime_func(int argc, const Token argv[])
 {
@@ -1147,15 +1073,11 @@ static Token strftime_func(int argc, const Token argv[])
     result.type=STRING;
   }
   /*}}}*/
-  else /* strftime type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: strftime(string[,integer])"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: strftime(string[,integer])"));
   return result;
 }
 /*}}}*/
+
 /* clock */ /*{{{*/
 static Token clock_func(int argc, const Token argv[])
 {
@@ -1191,132 +1113,137 @@ static Token clock_func(int argc, const Token argv[])
     result.type=EMPTY;
   }
   /*}}}*/
-  else /* wrong usage */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: clock(condition,location[,location])"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: clock(condition,location[,location])"));
   return result;
 }
 /*}}}*/
+
 /* poly */ /*{{{*/
 static Token poly_func(int argc, const Token argv[])
 {
-  /* variables */ /*{{{*/
-  Token result;
-  int i;
-  /*}}}*/
+  Token result, tmp;
+  const char *usage = _("Usage: poly(float|integer,float|integer,...)");
 
-  for (i=0; i<argc; ++i) if (argc<2 || (argv[i].type!=INT && argv[i].type!=FLOAT)) /* type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strcpy(malloc(strlen(_("Usage: poly(float|integer,float|integer,...)"))+1),_("Usage: poly(float|integer,float|integer,...)"));
-  }
-  /*}}}*/
-  else
-  {
-    Token tmp;
+  result.type = EMPTY;
+  if (argc < 2) duperror(&result, usage);
+  else for (size_t i = 0; i < argc; ++i)
+	 if (argv[i].type != INT && argv[i].type != FLOAT)
+	   duperror(&result, usage);
+  if (result.type == EEK) return result; 
 
-    result=tcopy(argv[1]);
-    for (i=2; i<argc; ++i)
-    {
-      tmp=tmul(result,argv[0]);
-      tfree(&result);
-      result=tmp;
-      tmp=tadd(result,argv[i]);
-      tfree(&result);
-      result=tmp;
-      if (result.type==EEK) return result;
-    }
+  result = tcopy(argv[1]);
+  for (size_t i = 2; i < argc; ++i)
+  {
+    tmp = tmul(result,argv[0]);
+    tfree(&result);
+    result = tmp;
+    tmp = tadd(result,argv[i]);
+    tfree(&result);
+    result = tmp;
+    if (result.type == EEK) return result;
   }
   return result;
 }
 /*}}}*/
+
 /* sin */ /*{{{*/
 static Token sin_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,sin,"sin");
 }
 /*}}}*/
+
 /* cos */ /*{{{*/
 static Token cos_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,cos,"cos");
 }
 /*}}}*/
+
 /* tan */ /*{{{*/
 static Token tan_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,tan,"tan");
 }
 /*}}}*/
+
 /* sinh */ /*{{{*/
 static Token sinh_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,sinh,"sinh");
 }
 /*}}}*/
+
 /* cosh */ /*{{{*/
 static Token cosh_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,cosh,"cosh");
 }
 /*}}}*/
+
 /* tanh */ /*{{{*/
 static Token tanh_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,tanh,"tanh");
 }
 /*}}}*/
+
 /* asin */ /*{{{*/
 static Token asin_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,asin,"asin");
 }
 /*}}}*/
+
 /* acos */ /*{{{*/
 static Token acos_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,acos,"acos");
 }
 /*}}}*/
+
 /* atan */ /*{{{*/
 static Token atan_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,atan,"atan");
 }
 /*}}}*/
+
 /* arsinh */ /*{{{*/
 static Token arsinh_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,arsinh,"arsinh");
 }
 /*}}}*/
+
 /* arcosh */ /*{{{*/
 static Token arcosh_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,arcosh,"arcosh");
 }
 /*}}}*/
+
 /* artanh */ /*{{{*/
 static Token artanh_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,artanh,"artanh");
 }
 /*}}}*/
+
 /* rad2deg */ /*{{{*/
 static Token rad2deg_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,rad2deg,"rad2deg");
 }
 /*}}}*/
+
 /* deg2rad */ /*{{{*/
 static Token deg2rad_func(int argc, const Token argv[])
 {
   return sci_func(argc,argv,deg2rad,"deg2rad");
 }
 /*}}}*/
+
 /* rnd */ /*{{{*/
 static Token rnd_func(int argc, const Token argv[])
 {
@@ -1329,14 +1256,11 @@ static Token rnd_func(int argc, const Token argv[])
     result.type=FLOAT;
     result.u.flt=rand()/((double)RAND_MAX);
   }
-  else
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: rnd()"));
-  }
+  else duperror(&result, _("Usage: rnd()"));
   return result;
 }
 /*}}}*/
+
 /* substr */ /*{{{*/
 static Token substr_func(int argc, const Token argv[])
 {
@@ -1367,14 +1291,11 @@ static Token substr_func(int argc, const Token argv[])
 	result.type=EMPTY;
     }
   }
-  else
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: substr(string,integer,integer)"));
-  }
+  else duperror(&result, _("Usage: substr(string,integer,integer)"));
   return result;
 }
 /*}}}*/
+
 /* strptime */ /*{{{*/
 static Token strptime_func(int argc, const Token argv[])
 {
@@ -1394,15 +1315,11 @@ static Token strptime_func(int argc, const Token argv[])
     result.type=INT;
   }
   /*}}}*/
-  else /* strftime type error */ /*{{{*/
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: strptime(string,string)"));
-  }
-  /*}}}*/
+  else duperror(&result, _("Usage: strptime(string,string)"));
   return result;
 }
 /*}}}*/
+
 /* time */ /*{{{*/
 static Token time_func(int argc, const Token argv[])
 {
@@ -1413,11 +1330,7 @@ static Token time_func(int argc, const Token argv[])
     result.type=INT;
     result.u.integer=time((time_t*)0);
   }
-  else	
-  {
-    result.type=EEK;
-    result.u.err=strdup(_("Usage: time()"));
-  }
+  else duperror(&result, _("Usage: time()"));
   return result;
 }
 /*}}}*/
diff --git a/src/common/scanner.c b/src/common/scanner.c
index d984ba1..b82fed1 100644
--- a/src/common/scanner.c
+++ b/src/common/scanner.c
@@ -31,7 +31,7 @@ extern double strtod(const char *nptr, char **endptr); /* SunOS 4 hack */
 const char *Type_Name[] =
   { [EMPTY] = "EMPTY", [STRING] = "STRING", [FLOAT] = "FLOAT", [INT] = "INT",
     [OPERATOR] = "OPERATOR", [LIDENT] = "LABEL", [FIDENT] = "FUNCTION",
-    [LOCATION] = "LOCATION", [EEK] = "ERROR"
+    [LOCATION] = "LOCATION", [FUNCALL] = "FUNCTION-CALL", [EEK] = "ERROR"
   };
 
 /* identcode  -- return number of identifier */ /*{{{*/
diff --git a/src/common/scanner.h b/src/common/scanner.h
index dbb713f..627ee77 100644
--- a/src/common/scanner.h
+++ b/src/common/scanner.h
@@ -11,7 +11,7 @@ extern "C" {
 typedef enum {
 	EMPTY
 #ifndef __cplusplus
-	, STRING, FLOAT, INT, OPERATOR, LIDENT, FIDENT, LOCATION, EEK
+	, STRING, FLOAT, INT, OPERATOR, LIDENT, FIDENT, LOCATION, FUNCALL, EEK
 #endif
 } Type;
 
@@ -37,7 +37,16 @@ typedef enum { X=0, Y=1, Z=2, HYPER} Dimensions;
 bool loc_in_box(const Location test,
 		const Location b, const Location c);
 
+typedef struct Token_struc Token;
+
 typedef struct
+{
+  int fident;
+  int argc;
+  Token *argv;
+} FunctionCall;
+
+typedef struct Token_struc
 {
   Type type;
   union
@@ -49,6 +58,7 @@ typedef struct
     char *lident;
     int fident;
     Location location;
+    FunctionCall funcall;
     char *err;
   } u;
 } Token;