diff --git a/gtk2_ardour/editor_pt_import.cc b/gtk2_ardour/editor_pt_import.cc
index 15723c3b27..3639fcf877 100644
--- a/gtk2_ardour/editor_pt_import.cc
+++ b/gtk2_ardour/editor_pt_import.cc
@@ -121,6 +121,7 @@ Editor::do_ptimport (std::string ptpath,
 	vector<string> to_import;
 	string fullpath;
 	bool ok = false;
+	bool onefailed = false;
 	PTFFormat ptf;
 	framepos_t pos = -1;
 
@@ -165,9 +166,19 @@ Editor::do_ptimport (std::string ptpath,
 
 			ptfwavpair.push_back(p);
 			imported.push_back(import_status.sources.back());
+		} else {
+			onefailed = true;
 		}
 	}
 
+	if (onefailed) {
+		MessageDialog msg (_("Failed to load one or more of the audio files, but continuing to attempt import."));
+		msg.run ();
+	} else {
+		MessageDialog msg (_("Success! Import should complete soon."));
+		msg.run ();
+	}
+
 	for (vector<PTFFormat::region_t>::iterator a = ptf.regions.begin();
 			a != ptf.regions.end(); ++a) {
 		for (vector<ptflookup_t>::iterator p = ptfwavpair.begin();
diff --git a/libs/ptformat/ptfformat.cc b/libs/ptformat/ptfformat.cc
index 048c174918..8c3452c868 100644
--- a/libs/ptformat/ptfformat.cc
+++ b/libs/ptformat/ptfformat.cc
@@ -113,6 +113,7 @@ PTFFormat::load(std::string path, int64_t targetsr) {
 	uint64_t i;
 	uint64_t j;
 	int inv;
+	int err;
 
 	if (! (fp = fopen(path.c_str(), "rb"))) {
 		return -1;
@@ -257,8 +258,12 @@ PTFFormat::load(std::string path, int64_t targetsr) {
 		}
 	}
 
+	if (version < 5 || version > 12)
+		return -1;
 	targetrate = targetsr;
-	parse();
+	err = parse();
+	if (err)
+		return -1;
 	return 0;
 }
 
@@ -298,36 +303,48 @@ PTFFormat::unxor10(void)
 	}
 }
 
-void
+int
 PTFFormat::parse(void) {
 	if (version == 5) {
 		parse5header();
 		setrates();
+		if (sessionrate < 44100 || sessionrate > 192000)
+		  return -1;
 		parseaudio5();
 		parserest5();
 	} else if (version == 7) {
 		parse7header();
 		setrates();
+		if (sessionrate < 44100 || sessionrate > 192000)
+		  return -1;
 		parseaudio();
 		parserest89();
 	} else if (version == 8) {
 		parse8header();
 		setrates();
+		if (sessionrate < 44100 || sessionrate > 192000)
+		  return -1;
 		parseaudio();
 		parserest89();
 	} else if (version == 9) {
 		parse9header();
 		setrates();
+		if (sessionrate < 44100 || sessionrate > 192000)
+		  return -1;
 		parseaudio();
 		parserest89();
 	} else if (version == 10 || version == 11 || version == 12) {
 		parse10header();
 		setrates();
+		if (sessionrate < 44100 || sessionrate > 192000)
+		  return -1;
 		parseaudio();
 		parserest10();
 	} else {
 		// Should not occur
+		return -1;
 	}
+	return 0;
 }
 
 void
diff --git a/libs/ptformat/ptfformat.h b/libs/ptformat/ptfformat.h
index 1ae362d672..785544daa0 100644
--- a/libs/ptformat/ptfformat.h
+++ b/libs/ptformat/ptfformat.h
@@ -117,7 +117,7 @@ public:
 
 private:
 	bool foundin(std::string haystack, std::string needle);
-	void parse(void);
+	int parse(void);
 	void unxor10(void);
 	void setrates(void);
 	void parse5header(void);