undefined reference to function from my library

Hi all,

I'm trying to write my own MIDI library for the Arduino.
Now I seem to have com across a strange problem. Apparently I'm able to call the begin() method of my object, but when I try to call read() I get an error telling me there is no reference to that method...

o: In function `loop': E:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\build52696.tmp/Temporary_8968_8700.cpp:17: undefined reference to `MIDI::read()'

Basically I can call methods that don't return anything, but I can't call methods with a return value.

code:
MIDI.h:

Code:

#ifndef MIDI_h
#define MIDI_h

#include "WConstants.h"

struct Midimsg {
   byte status;
   byte data1;
   byte data2;
};

class MIDI {
   public:
   MIDI();
   void begin();
   bool read();
   void send(byte status, byte data1, byte data2);
   void send(byte status, byte data1);
   void send(byte status);
   byte getStatus();
   byte getData1();
   byte getData2();
   byte getChannelFromStatus(byte status);
   int getMessageSize(byte status);
   private:
   Midimsg msg;
   byte getNextByte();
   void clearMessage();
};

#endif

MIDI.cpp:

Code:

#include "WProgram.h"

#include "MIDI.h"
#include "HardwareSerial.h"

MIDI::MIDI() { }

void MIDI::begin() {
   Serial.begin(31250);
}

bool MIDI::read() {
   clearMessage();
   if (Serial.available() > 0) {
   byte sts = Serial.read();
   int size = getMessageSize(sts);
   switch (format) {
   case 1: {
   msg.status = sts;
   msg.data1 = 0;
   msg.data2 = 0;
   }
   return true;

   case 2: {
   byte dat1 = getNextByte();
   if (dat1 != -1) {
   msg.status = sts;
   msg.data1 = dat1;
   msg.data2 = 0;
   }
   }
   return true;

   case 3: {
   byte dat1 = getNextByte();
   if (dat1 != -1) {
   byte dat2 = getNextByte();
   if (dat2 != -1) {
   msg.status = sts;
   msg.data1 = dat1;
   msg.data2 = dat2;
   }
   }
   }
   return true;

   case -1:
   return false; // invalid status byte
   }
   }
   else {
   return false;
   }
   return false;
}

void MIDI::send(byte status, byte data1, byte data2) {
   Serial.print(status, BYTE);
   Serial.print(data1, BYTE);
   Serial.print(data2, BYTE);
}

void MIDI::send(byte status, byte data1) {
   Serial.print(status, BYTE);
   Serial.print(data1, BYTE);
}

void MIDI::send(byte status) {
   Serial.print(status, BYTE);
}

byte MIDI::getStatus() {
   return msg.status;
}

byte MIDI::getData1() {
   return msg.data1;
}

byte MIDI::getData2() {
   return msg.data2;
}

byte MIDI::getChannelFromStatus(byte status) {
   return (status & 0x0F);
}

int MIDI::getMessageSize(byte status) {
   if (status > 0xF5) { // 1 byte msg
   return 1;
   }
   else if ((status > 0xC0 && status < 0xE0) || (status == 0xF3)) { // 2 byte msg
   return 2;
   }
   else if ((status > 0x7F && status < 0xC0) || (status > 0xDF && status < 0xF0)) { // 3 byte msg
   return 3;
   }
   else {
   return -1; // invalid/unsupported message
   }
}

byte MIDI::getNextByte() {
   int i = 3;
   while ((Serial.available() < 1) && (i > 0)) { // wait for the 2nd byte if it isn't already available
   delayMicroseconds(10);
   i--;
   }
   return Serial.read();
}

void MIDI::clearMessage() {
   msg.status = 0;
   msg.data1 = 0;
   msg.data2 = 0;
}

I'm using version 0015 and experienced the same problem with v0013.

Great thanks in advance.

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