#include <EthernetUdp.h> not found in compile

Using Arduino Programming Questions
#1

At the top of the file I have #EthernetUdp.h but when I compile it I get the error;

EthernetFindIPAddress.ino: In function 'void setup()':
EthernetFindIPAddress.ino:33:3: error: 'EthernetUdp' was not declared in this scope

Here is the code

//#include <Dhcp.h>
#include <Dns.h>
#include <Ethernet.h>
//#include <EthernetClient.h>
//#include <EthernetServer.h>
//#include <EthernetUdp.h>

#include <SPI.h>

// MAC address and IP for arduino
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress ip( 192, 168, 100, 100 ); // IP Address of Ethernet Shield.
IPAddress subnet( 255, 255, 255, 0 );
IPAddress gateway( 192, 168, 10, 251 );
IPAddress dnsServer( 192, 168, 10, 1 );

unsigned int localPort = 8888; // local port to listen on
//unsigned int IPlength = 12;

// SenderIP and SenderPort are set when message is received
byte SenderIP[] = {0,0,0,0}; // holds received packet's originating IP
unsigned int SenderPort; // holds received packet's originating port

// buffer for receiving data
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet
int packetSize = 0;

void setup()
{
Ethernet.begin(mac, ip, dnsServer, gateway, subnet);
//Ethernet.begin(mac,ip); //start Ethernet
EthernetUdp.begin(localPort); //start UDP
}

void loop()
{
if(NewPortMessage())
{
// Do stuff, SenderIP is the IP where the UDP message was received from
}
}

boolean NewPortMessage()
{
packetSize = EthernetUdp.available();
if(packetSize > 0)
{
packetSize -= 8; //subtract UDP 8-byte header
// read the packet into packetBufffer and get the senders IP addr and port number
EthernetUdp.readPacket(packetBuffer,UDP_TX_PACKET_MAX_SIZE, SenderIP, SenderPort);
return true;
}
clearPacketBuffer();
return false;
}

void clearPacketBuffer()
{
for(int i=0; i < packetSize; i++)
packetBuffer = 0;
}
Here is the compiler error mesaages (in full);
EthernetFindIPAddress.ino: In function 'void setup()':
EthernetFindIPAddress.ino:33:3: error: 'EthernetUdp' was not declared in this scope
EthernetFindIPAddress.ino: In function 'boolean NewPortMessage()':
EthernetFindIPAddress.ino:46:16: error: 'EthernetUdp' was not declared in this scope
Error compiling.
Can someone see what the issue is? - because I have tried everything I can think of with no solution!!
Sincerely,
Sciencez

#2

This is not including EthernetUdp.h.

//#include <EthernetUdp.h>

Remove the comment slashes.

#3

Yes, You are right in this code listing but when I remove the comments I still get the same error message(s).

The comments were left in by accident (when I posted the code listing). If I compile the code listing (without the //#include <EthernetUdp.h> I still get hte same error messages.

#4

Does EthernetUdp return a value, that needs to be read ?

#5

Look in two places.
In your libraries folder, check in the Ethernet folder that there are EthernetUdp.h and EthernetUdp.cpp files.
In your sketchbook folder, check in the libraries folder, insure there is not an Ethernet folder and files there.

edit: I didn't notice in your code that you didn't start an instance of EthernetUdp.

EthernetUdp Udp;

void setup()
{
  Ethernet.begin(mac, ip, dnsServer, gateway, subnet);
  Udp.begin(localPort);    //start UDP
}
#6