diff --git a/middleware/qira.py b/middleware/qira.py
index 854471be..67c65728 100755
--- a/middleware/qira.py
+++ b/middleware/qira.py
@@ -28,6 +28,8 @@ if __name__ == '__main__':
   parser.add_argument("--web-port", metavar="PORT", help="listen port for web interface. 3002 by default", type=int, default=qira_config.WEB_PORT)
   parser.add_argument("--socat-port", metavar="PORT", help="listen port for socat. 4000 by default", type=int, default=qira_config.SOCAT_PORT)
   parser.add_argument('-S', '--static', help="enable static2", action="store_true")
+  parser.add_argument('--no-run', help="don't run the program", action="store_true")
+  parser.add_argument('--no-delete-runs', help="don't clear the logs", action="store_true")
   #capstone flag in qira_config for now
 
   # parse arguments, first try
@@ -89,14 +91,15 @@ if __name__ == '__main__':
   except:
     is_qira_running = 0
     print("no qira server found, starting it")
-    program.clear()
+    program.clear(not args.no_delete_runs)
 
   # start the binary runner
   if args.server:
     qira_socat.start_bindserver(program, qira_config.SOCAT_PORT, -1, 1, True)
   else:
-    print("**** running",program.program)
-    program.execqira(shouldfork=not is_qira_running)
+    if not args.no_run:
+      print("**** running",program.program)
+      program.execqira(shouldfork=not is_qira_running)
 
   if not is_qira_running:
     # start the http server
diff --git a/middleware/qira_analysis.py b/middleware/qira_analysis.py
index e8e5634f..c5c3a611 100755
--- a/middleware/qira_analysis.py
+++ b/middleware/qira_analysis.py
@@ -373,16 +373,16 @@ def analyse_calls(trace):
         rchanges = filter(lambda x:x['type'] in "RW",trace.db.fetch_changes_by_clnum(cl, -1))
         for rchange in rchanges:
           regnum = rchange['address']//rsize
-          if rchange['type'] is 'W' and regnum < nregs:
+          if rchange['type'] == 'W' and regnum < nregs:
             init_regs.add(regnum)
             if ((regnum) in uninit_regs) and (rchange['data'] == regs[regnum]):
               #if we thought they did an uninitialized read and they just clobbered it and wrote it later,
               #don't consider this a possible argument
               uninit_regs.remove(regnum)
-          elif (rchange['type'] is 'R' and regnum < nregs) and (regnum not in init_regs):
+          elif (rchange['type'] == 'R' and regnum < nregs) and (regnum not in init_regs):
             uninit_regs.add(regnum)
       abi,nargs = guess_calling_conv(program,uninit_regs,((seen-esp)/rsize) if (seen > 0) else 0)
-      if func.abi is 'UNKNOWN':
+      if func.abi == 'UNKNOWN':
         func.abi = abi
       func.nargs = max(nargs,func.nargs)
 
@@ -394,7 +394,7 @@ def display_call_args(instr,trace,clnum):
   program.static.analyzer.make_function_at(program.static,iptr)
 
   func = program.static[iptr]['function']
-  if func.abi is 'UNKNOWN':
+  if func.abi == 'UNKNOWN':
     return ""
 
   endclnum = get_last_instr(trace.dmap,clnum)
diff --git a/middleware/qira_program.py b/middleware/qira_program.py
index 4f64ec4c..7abfc532 100644
--- a/middleware/qira_program.py
+++ b/middleware/qira_program.py
@@ -285,10 +285,11 @@ class Program:
     else:
       raise Exception("unknown binary type")
 
-  def clear(self):
+  def clear(self, delete_old_runs=True):
     # probably always good to do except in development of middleware
-    print("*** deleting old runs")
-    self.delete_old_runs()
+    if delete_old_runs:
+      print("*** deleting old runs")
+      self.delete_old_runs()
 
     # getting asm from qemu
     self.create_asm_file()
diff --git a/middleware/qiradb/Trace/Trace.cpp b/middleware/qiradb/Trace/Trace.cpp
index 8f153378..79c33d03 100644
--- a/middleware/qiradb/Trace/Trace.cpp
+++ b/middleware/qiradb/Trace/Trace.cpp
@@ -18,6 +18,8 @@
 #define PAGE_MASK 0xFFFFFFFFFFFFF000LL
 #define INVALID_CLNUM 0xFFFFFFFF
 
+int DEBUG_TRACE = getenv("DEBUG_TRACE") != NULL ? atoi(getenv("DEBUG_TRACE")) : 0;
+
 void *thread_entry(void *trace_class) {
   Trace *t = (Trace *)trace_class;  // best c++ casting
 
@@ -74,12 +76,13 @@ char Trace::get_type_from_flags(uint32_t flags) {
 }
 
 inline void Trace::commit_memory(Clnum clnum, Address a, uint8_t d) {
+  if (DEBUG_TRACE) printf("DEBUG_TRACE: commit_memory at %u address: %llx data: %x\n", clnum, a, d);
   pair<map<Address, MemoryCell>::iterator, bool> ret = memory_.insert(MP(a, MemoryCell()));
   ret.first->second[clnum] = d;
 }
 
 inline MemoryWithValid Trace::get_byte(Clnum clnum, Address a) {
-  //printf("get_byte %u %llx\n", clnum, a);
+  if (DEBUG_TRACE >= 2) printf("DEBUG_TRACE: get_byte %u %llx\n", clnum, a);
   map<Address, MemoryCell>::iterator it = memory_.find(a);
   if (it == memory_.end()) return 0;
 
@@ -130,6 +133,8 @@ bool Trace::remap_backing(uint64_t new_size) {
 }
 
 bool Trace::ConnectToFileAndStart(char *filename, unsigned int trace_index, int register_size, int register_count, bool is_big_endian) {
+  if (DEBUG_TRACE) printf("DEBUG_TRACE: constructing Trace with file %s\n", filename);
+
   trace_index_ = trace_index;
   is_big_endian_ = is_big_endian;
   register_size_ = register_size;
@@ -184,6 +189,7 @@ void Trace::process() {
     // no need to lock this here, because this is the only thread that changes it
     const struct change *c = &backing_[entries_done_];
     char type = get_type_from_flags(c->flags);
+    if (DEBUG_TRACE >= 2) printf("DEBUG_TRACE: parsing change %d with type %c\n", c->clnum, type);
 
     RWLOCK_WRLOCK(db_lock_);
     // clnum_to_entry_number_, instruction_pages_
diff --git a/web/client/static/graph.js b/web/client/static/graph.js
index b24a2e27..520ffafc 100644
--- a/web/client/static/graph.js
+++ b/web/client/static/graph.js
@@ -190,10 +190,9 @@ Graph.prototype.render = function() {
 
     } else {
       // this is a vertex
-      var addr = resp[i].split(' ')[0].split('N')[1].trim();
+      var addr = resp[i].split(' ')[0].split('N')[1].split('\t')[0].trim();
       var pos = resp[i].slice(resp[i].indexOf('pos=')).split('"')[1].split(',');
 
-      //p(addr);
       var r = this.vertices[addr].rendered;
 
       if (r !== undefined) {