diff --git a/commandline.cpp b/commandline.cpp
index a7cedd0a..c94672f4 100644
--- a/commandline.cpp
+++ b/commandline.cpp
@@ -65,6 +65,8 @@ namespace arg {
     lshift(); if(pos > isize(argument)) { printf("Missing parameter\n"); exit(1); }
     }
   
+  bool nomore() { return pos >= isize(argument); }
+  
   const string& args() { return argument[pos]; }
   const char* argcs() { return args().c_str(); }
   int argi() { return atoi(argcs()); }
diff --git a/hyper.h b/hyper.h
index 6979df98..abf57a78 100644
--- a/hyper.h
+++ b/hyper.h
@@ -2292,6 +2292,7 @@ namespace arg {
   int argi();
   ld argf();
   bool argis(const string& s);
+  bool nomore();
   unsigned arghex();
 
   inline void shift_arg_formula(ld& x, const reaction_t& r = reaction_t()) { shift(); x = argf(); 
diff --git a/rogueviz.cpp b/rogueviz.cpp
index f82f9d0b..89f40812 100644
--- a/rogueviz.cpp
+++ b/rogueviz.cpp
@@ -1721,9 +1721,9 @@ int readArgs() {
     shift();
     transmatrix *T = &T2;
     while(true) {
-      if(arg::pos >= isize(arg::argument)) break;
+      if(arg::nomore()) break;
       else if(argis("fd")) { shift(); *T = *T * xpush(argf()); shift(); }
-      else if(argcs()[0] == 't') { shift(); *T = *T * hr::cspin(dimid(argcs()[1]),dimid(argcs()[2]),argf()); shift(); }
+      else if(argcs()[0] == 't') { int x = dimid(argcs()[1]); int y = dimid(argcs()[2]); shift(); *T = *T * hr::cspin(x, y, argf()); shift(); }
       else if(argis("/")) { shift(); if(T == &T2) T = &T3; else break; }
       else break;
       }