diff --git a/libcoz/inspect.cpp b/libcoz/inspect.cpp
index 7c86fce..fa43366 100644
--- a/libcoz/inspect.cpp
+++ b/libcoz/inspect.cpp
@@ -478,41 +478,57 @@ bool memory_map::process_file(const string& name, uintptr_t load_address,
 
   // Walk through the compilation units (source files) in the executable
   for(auto unit : d.compilation_units()) {
+    auto& lineTable = unit.get_line_table();
+    int fileIndex = 0;
+    bool needProcess = false;
+    //check if files using by lineTable are in source_scope
+    while(true){
+      try{
+	if(in_scope(lineTable.get_file(fileIndex)->path, source_scope)){
+	  needProcess = true;
+	  break;
+        }  
+	fileIndex++;
+     }catch (out_of_range &e){
+	break;
+     }
+   }
+   if(needProcess){
+      try {
+        string prev_filename;
+        size_t prev_line;
+        uintptr_t prev_address = 0;
+        set<string> included_files;
+        // Walk through the line instructions in the DWARF line table
+        for(auto& line_info : unit.get_line_table()) {
+          // Insert an entry if this isn't the first line command in the sequence
+          if(in_scope(prev_filename, source_scope)) {
+            if(prev_address != 0) {
+              included_files.insert(prev_filename);
+              add_range(prev_filename,
+                        prev_line,
+                        interval(prev_address, line_info.address) + load_address);
+            }
+          }
 
-    try {
-      string prev_filename;
-      size_t prev_line;
-      uintptr_t prev_address = 0;
-      set<string> included_files;
-      // Walk through the line instructions in the DWARF line table
-      for(auto& line_info : unit.get_line_table()) {
-        // Insert an entry if this isn't the first line command in the sequence
-        if(in_scope(prev_filename, source_scope)) {
-          if(prev_address != 0) {
-            included_files.insert(prev_filename);
-            add_range(prev_filename,
-                      prev_line,
-                      interval(prev_address, line_info.address) + load_address);
+          if(line_info.end_sequence) {
+            prev_address = 0;
+          } else {
+            prev_filename = canonicalize_path(line_info.file->path);
+            prev_line = line_info.line;
+            prev_address = line_info.address;
           }
         }
+        process_inlines(unit.root(), unit.get_line_table(), source_scope, load_address);
 
-        if(line_info.end_sequence) {
-          prev_address = 0;
-        } else {
-          prev_filename = canonicalize_path(line_info.file->path);
-          prev_line = line_info.line;
-          prev_address = line_info.address;
+        for(const string& filename : included_files) {
+          INFO << "Included source file " << filename;
         }
-      }
-      process_inlines(unit.root(), unit.get_line_table(), source_scope, load_address);
 
-      for(const string& filename : included_files) {
-        INFO << "Included source file " << filename;
+      } catch(dwarf::format_error e) {
+        WARNING << "Ignoring DWARF format error when reading line table: " << e.what();
       }
-
-    } catch(dwarf::format_error e) {
-      WARNING << "Ignoring DWARF format error when reading line table: " << e.what();
-    }
+    }//if needProcess
   }
 
   return true;