diff --git a/code/userprog/addrspace.cc b/code/userprog/addrspace.cc
index 09cd5bb..758ea18 100644
--- a/code/userprog/addrspace.cc
+++ b/code/userprog/addrspace.cc
@@ -102,7 +102,9 @@ AddrSpace::AddrSpace (OpenFile * executable)
 	  // pageTable[i].physicalPage = i;	// for now, phys page # = virtual page #
 	  #ifdef CHANGED
       int newPage = pageProvider->GetEmptyPage();
-      ASSERT(newPage != -1);
+      if (newPage == -1) {
+          throw std::bad_alloc();
+      }
 	  pageTable[i].physicalPage = newPage;
       #endif
       pageTable[i].valid = TRUE;
diff --git a/code/userprog/userthread.cc b/code/userprog/userthread.cc
index 8de15db..7a84f43 100644
--- a/code/userprog/userthread.cc
+++ b/code/userprog/userthread.cc
@@ -99,7 +99,7 @@ void do_ThreadExit(){
 void StartUserProc( void * args ){
     currentThread->space->InitRegisters();
     currentThread->space->RestoreState(); 
-    machine->DumpMem("memory.svg");
+    //machine->DumpMem("memory.svg");
     machine->Run();
 }
 
@@ -119,7 +119,7 @@ int do_ForkExec( const char * c){
     try { 
     	space = new AddrSpace(file);
     }catch(const std::bad_alloc& e) {
-    	fprintf(stderr,"no empty space on memory\n");
+    	fprintf(stderr,"Could not allocate Memory\n");
         Exit(1);
     }