diff --git a/sIDE/Makefile b/sIDE/Makefile
index a715ab0..a4fcd46 100644
--- a/sIDE/Makefile
+++ b/sIDE/Makefile
@@ -33,7 +33,7 @@ MOVE          = mv -f
 TAR           = tar -cf
 COMPRESS      = gzip -9f
 DISTNAME      = sIDE1.0.0
-DISTDIR = /home/sky/homework/c_asm_ds/sIDE/.tmp/sIDE1.0.0
+DISTDIR = /home/sky/lab/projects/sIDE/sIDE/.tmp/sIDE1.0.0
 LINK          = g++
 LFLAGS        = -Wl,-O1 -Wl,-O1,--sort-common,--as-needed,-z,relro
 LIBS          = $(SUBLIBS) -lQt5Widgets -lQt5Gui -lQt5Core -lGL -lpthread 
@@ -627,17 +627,17 @@ moc_mainwindow.cpp: consoleworker.h \
 		mainwindow.h \
 		moc_predefs.h \
 		/usr/bin/moc
-	/usr/bin/moc $(DEFINES) --include ./moc_predefs.h -I/usr/lib/qt/mkspecs/linux-g++ -I/home/sky/homework/c_asm_ds/sIDE -I/usr/include/qt -I/usr/include/qt/QtWidgets -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I/usr/include/c++/6.3.1 -I/usr/include/c++/6.3.1/x86_64-pc-linux-gnu -I/usr/include/c++/6.3.1/backward -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include -I/usr/local/include -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include-fixed -I/usr/include mainwindow.h -o moc_mainwindow.cpp
+	/usr/bin/moc $(DEFINES) --include ./moc_predefs.h -I/usr/lib/qt/mkspecs/linux-g++ -I/home/sky/lab/projects/sIDE/sIDE -I/usr/include/qt -I/usr/include/qt/QtWidgets -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I/usr/include/c++/6.3.1 -I/usr/include/c++/6.3.1/x86_64-pc-linux-gnu -I/usr/include/c++/6.3.1/backward -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include -I/usr/local/include -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include-fixed -I/usr/include mainwindow.h -o moc_mainwindow.cpp
 
 moc_consoleworker.cpp: consoleworker.h \
 		moc_predefs.h \
 		/usr/bin/moc
-	/usr/bin/moc $(DEFINES) --include ./moc_predefs.h -I/usr/lib/qt/mkspecs/linux-g++ -I/home/sky/homework/c_asm_ds/sIDE -I/usr/include/qt -I/usr/include/qt/QtWidgets -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I/usr/include/c++/6.3.1 -I/usr/include/c++/6.3.1/x86_64-pc-linux-gnu -I/usr/include/c++/6.3.1/backward -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include -I/usr/local/include -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include-fixed -I/usr/include consoleworker.h -o moc_consoleworker.cpp
+	/usr/bin/moc $(DEFINES) --include ./moc_predefs.h -I/usr/lib/qt/mkspecs/linux-g++ -I/home/sky/lab/projects/sIDE/sIDE -I/usr/include/qt -I/usr/include/qt/QtWidgets -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I/usr/include/c++/6.3.1 -I/usr/include/c++/6.3.1/x86_64-pc-linux-gnu -I/usr/include/c++/6.3.1/backward -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include -I/usr/local/include -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include-fixed -I/usr/include consoleworker.h -o moc_consoleworker.cpp
 
 moc_asmeditor.cpp: asmeditor.h \
 		moc_predefs.h \
 		/usr/bin/moc
-	/usr/bin/moc $(DEFINES) --include ./moc_predefs.h -I/usr/lib/qt/mkspecs/linux-g++ -I/home/sky/homework/c_asm_ds/sIDE -I/usr/include/qt -I/usr/include/qt/QtWidgets -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I/usr/include/c++/6.3.1 -I/usr/include/c++/6.3.1/x86_64-pc-linux-gnu -I/usr/include/c++/6.3.1/backward -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include -I/usr/local/include -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include-fixed -I/usr/include asmeditor.h -o moc_asmeditor.cpp
+	/usr/bin/moc $(DEFINES) --include ./moc_predefs.h -I/usr/lib/qt/mkspecs/linux-g++ -I/home/sky/lab/projects/sIDE/sIDE -I/usr/include/qt -I/usr/include/qt/QtWidgets -I/usr/include/qt/QtGui -I/usr/include/qt/QtCore -I/usr/include/c++/6.3.1 -I/usr/include/c++/6.3.1/x86_64-pc-linux-gnu -I/usr/include/c++/6.3.1/backward -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include -I/usr/local/include -I/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.1/include-fixed -I/usr/include asmeditor.h -o moc_asmeditor.cpp
 
 compiler_moc_source_make_all:
 compiler_moc_source_clean:
diff --git a/sIDE/mainwindow.cpp b/sIDE/mainwindow.cpp
index cc799f8..ecd076d 100644
--- a/sIDE/mainwindow.cpp
+++ b/sIDE/mainwindow.cpp
@@ -270,7 +270,7 @@ void MainWindow::on_assemble_triggered()
     ui->actionAssemble_Run->setEnabled(false);
 
     ui->tabWidget->setCurrentWidget(ui->tabAssembler);
-    assembleWorker->execute(tr("sas.exe"), args);
+    assembleWorker->execute(tr("./sas.exe"), args);
 }
 
 void MainWindow::on_runThread_started()
@@ -308,7 +308,7 @@ void MainWindow::on_run_triggered()
 
     ui->actionRun->setEnabled(false);
     ui->actionKill->setEnabled(true);
-    runWorker->execute(tr("ssim.exe"), args);
+    runWorker->execute(tr("./ssim.exe"), args);
 }
 
 void MainWindow::on_stop_triggered()
diff --git a/sas/sas.c b/sas/sas.c
index 5579a44..15d86f3 100644
--- a/sas/sas.c
+++ b/sas/sas.c
@@ -42,17 +42,10 @@ FILE *g_fin, *g_fout;
 FILE *g_flist;
 
 // Translate a string to uppercase.
-// But characters surrounded by "" or with proceeding # will be ignored.
+// But characters surrounded by "" will be ignored.
 void str_toupper(char *str) {
-  bool in_quote = false;
-  
-  for (; *str && '#' != *str; ++str) {
-    if ('\"' == *str) {
-      in_quote = !in_quote;
-    } else {
-      if (!in_quote)
-        *str = toupper(*str);
-    }
+  for (; *str && '\"' != *str; ++str) {
+    *str = toupper(*str);
   }
 }
 
@@ -240,15 +233,30 @@ int process_bracket(char **curr_ptr, size_t elem_size) {
 // Process string constant initializers.
 // Returns the string length on sucess, negative number on failure.
 int process_string_const(char **line) {
-  char string[LINE_BUF_SIZE], len;
-  
-  if (1 != sscanf(*line, "\"%[^\"]\"", string)) return -1;
-  
-  len = strlen(string);
-  fwrite(string, len + 1, 1, g_fout);
-  *line += len+2;
+  char str[LINE_BUF_SIZE], *str_ptr, *line_ptr;
+  int len = 0;
+
+  str_ptr = str;
+  line_ptr = *line + 1;
+  for (; *line_ptr && '\"' != *line_ptr; ++line_ptr) {
+    if ('\\' == *line_ptr) {
+      if (*++line_ptr) {
+        *str_ptr++ = *line_ptr;
+      } else {
+        return -1;
+      }
+    } else {
+      *str_ptr++ = *line_ptr;
+    }
+  }
+  *str_ptr = 0;
+
+  if ('\"' != *line_ptr) return -1; // Unmatched quotes
+  len = str_ptr-str+1;
+  fwrite(str, len, 1, g_fout);
+  *line = line_ptr + 1;
   
-  return len + 1;
+  return len;
 }
 
 // Process data definitions.
@@ -327,11 +335,19 @@ int process_data(char *line, char *keyword, int step) {
         
       } else if ('\"' == *curr_ptr && 1 == elem_size) { // String
         int val_num = process_string_const(&curr_ptr);
-        if (val_num < 0 || val_num > elem_num) return -1;
+        if (val_num < 0) {
+          puts("Illegal string constant");
+          return -1;
+        }
+        if (val_num > elem_num) {
+          puts("String constant exceeds the capacity of the array");
+          return -1;
+        }
         // Fill out the rest with zeros.
         fwrite(&zero, elem_size, elem_num - val_num, g_fout);
         
       } else { // Illegal syntax.
+        puts("Illegal data syntax");
         return -1;
       }
       
@@ -341,7 +357,10 @@ int process_data(char *line, char *keyword, int step) {
 
     // Process ending.
     while (isspace(*curr_ptr)) curr_ptr++;
-    if (*curr_ptr != '\0' && *curr_ptr != '#') return -1;
+    if (*curr_ptr != '\0' && *curr_ptr != '#') {
+      printf("Trailling garbage: %s\n", curr_ptr);
+      return -1;
+    }
   }
 
   curr_ds_addr += elem_num * elem_size;
diff --git a/test/puts.txt b/test/puts.txt
new file mode 100644
index 0000000..b1e66f5
--- /dev/null
+++ b/test/puts.txt
@@ -0,0 +1,12 @@
+	byte	text[16] = "Say: \"Hello!\""
+
+	loadi	G	0
+loop:
+	loadb	A	text
+	equ	A	Z
+	cjmp	end
+	out	A	15
+	addi	G	1
+	jmp	loop
+end:
+	ret