diff --git a/apple/applevm.cpp b/apple/applevm.cpp
index 4c47a7f..9abf527 100644
--- a/apple/applevm.cpp
+++ b/apple/applevm.cpp
@@ -94,6 +94,7 @@ void AppleVM::Resume(const char *fn)
 #else
     printf("Unable to open resume file\n");
 #endif
+    g_filemanager->closeFile(fh);
     return;
   }
 
@@ -101,6 +102,7 @@ void AppleVM::Resume(const char *fn)
   for (int i=0; i<strlen(suspendHdr); i++) {
     if (g_filemanager->readByte(fh) != suspendHdr[i]) {
       /* Failed to read correct header; abort */
+      g_filemanager->closeFile(fh);
       return;
     }
   }
@@ -110,7 +112,9 @@ void AppleVM::Resume(const char *fn)
       disk6->Deserialize(fh) &&
       hd32->Deserialize(fh)
       ) {
-#ifndef TEENSYDUINO
+#ifdef TEENSYDUINO
+    Serial.println("Deserialization successful");
+#else
     printf("All deserialized successfully\n");
 #endif
   } else {
@@ -121,7 +125,6 @@ void AppleVM::Resume(const char *fn)
   }
 
   g_filemanager->closeFile(fh);
-
 }
 
 // fixme: make member vars
diff --git a/teensy/teensy-filemanager.cpp b/teensy/teensy-filemanager.cpp
index 0c5f87d..ec40e6e 100644
--- a/teensy/teensy-filemanager.cpp
+++ b/teensy/teensy-filemanager.cpp
@@ -9,7 +9,7 @@
 SdFatSdio sd;
 File file;
 
-uint8_t rawFd;
+int8_t rawFd;
 File rawFile;
 
 TeensyFileManager::TeensyFileManager()
@@ -270,14 +270,16 @@ bool TeensyFileManager::_prepCache(int8_t fd)
     // Not our cached file, or we have no cached file
     if (rawFd != -1) {
       // Close the old one if we had one
-      Serial.println("closing old cache file");
+      Serial.print("closing old cache file ");
+      Serial.println(rawFd);
       rawFile.close();
       rawFd = -1;
     }
 
     Serial.println("opening new cache file");
     // Open the new one
-    if (!sd.open(cachedNames[fd], O_RDWR | O_CREAT)) {
+    rawFile = sd.open(cachedNames[fd], O_RDWR | O_CREAT);
+    if (!rawFile) {
       Serial.print("_prepCache: failed to open ");
       Serial.println(cachedNames[fd]);
       return false;
@@ -304,8 +306,10 @@ uint8_t TeensyFileManager::readByteAt(int8_t fd, uint32_t pos)
   _prepCache(fd);
 
   if (!rawFile.seek(pos)) {
-    Serial.println("readByteAt: seek failed");
-    return false;
+    Serial.print("readByteAt: seek failed to pos ");
+    Serial.println(pos);
+    Serial.println("Trying to continue anyway");
+    //    return false;
   }
   uint8_t b;
   return (rawFile.read(&b, 1) == 1);
@@ -342,12 +346,14 @@ uint8_t TeensyFileManager::readByte(int8_t fd)
   uint32_t pos = fileSeekPositions[fd];
 
   if (!rawFile.seek(pos)) {
-    Serial.println("readByteAt: seek failed");
+    Serial.print("readByte: seek failed to byte ");
+    Serial.println(pos);
     return false;
   }
 
   uint8_t b;
   rawFile.read(&b, 1);
+  fileSeekPositions[fd]++;
 
   // FIXME: check v == 1 & handle error
   return b;