Error building Arduino WiShield Flash example: 'dflash' was not declared in this scope I'm using WiShield library from: https://github.com/jcmuller/WiShield

What is wrong with this library?

The code:

/*
 * Web Server using Flash
 *
 * A simple web server example using the WiShield 2.0
 * that reads the manufacturing ID from the Flash and
 * displays it on a webpage.
 */

#include &lt;WiShield.h&gt;
#include &lt;dataflash.h&gt;

#define WIRELESS_MODE_INFRA    1
#define WIRELESS_MODE_ADHOC    2

#define FLASH_SLAVE_SELECT 7
#define WIFI_SLAVE_SELECT  10

// Wireless configuration parameters ----------------------------------------
unsigned char local_ip[] = {192,168,1,2};   // IP address of WiShield
unsigned char gateway_ip[] = {192,168,1,1}; // router or gateway IP address
unsigned char subnet_mask[] = {255,255,255,0};  // subnet mask for the local network
const prog_char ssid[] PROGMEM = {"ASYNCLABS"}; // max 32 bytes

unsigned char security_type = 0;    // 0 - open; 1 - WEP; 2 - WPA; 3 - WPA2

// WPA/WPA2 passphrase
const prog_char security_passphrase[] PROGMEM = {"12345678"};   // max 64 characters

// WEP 128-bit keys
// sample HEX keys
prog_uchar wep_keys[] PROGMEM = {   0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,     0x09, 0x0a, 0x0b, 0x0c, 0x0d,   // Key 0
                                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,   // Key 1
                                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,   // Key 2
                                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00    // Key 3
                            };

// setup the wireless mode
// infrastructure - connect to AP
// adhoc - connect to another WiFi device
unsigned char wireless_mode = WIRELESS_MODE_INFRA;

unsigned char ssid_len;
unsigned char security_passphrase_len;
//---------------------------------------------------------------------------

unsigned char mfg_id[4];

void setup()
{
  initShield();  
}

// This is the webpage that is served up by the webserver
const prog_char webpage[] PROGMEM = "HTTP/1.1 200 OK\r\nContent-Type:     text/html\r\n\r\n"
                                "&lt;html&gt;&lt;body style=\"margin:100px\"&gt;"
                                "&lt;center&gt;"
                                "&lt;h1&gt;Flash Mfg ID: 000 000 000&lt;/h1&gt;"
                                "&lt;form method=post action=\"/upload\" enctype=\"multipart/form-data\"&gt;"
                                "&lt;b&gt;FS Image Upload&lt;/b&gt;"
                                "&lt;p&gt;"
                                "&lt;input type=file name=i size=40&gt; &amp;nbsp; &lt;input type=submit value=\"Upload\"&gt;"
                                "&lt;/form&gt;"
                                "&lt;/center&gt;"
                                "&lt;/body&gt;&lt;/html&gt;";

void loop()
{ 
  dflash.read_id(mfg_id);

  WiFi.run();
}

void initShield()
{
  // there is some contention on the SPI between the flash and wifi chip,
  // so disable both devices at the beginning until they are properly
  // initialized by their respective libraries
  pinMode(FLASH_SLAVE_SELECT, OUTPUT);
  digitalWrite(FLASH_SLAVE_SELECT, HIGH);
  pinMode(WIFI_SLAVE_SELECT, OUTPUT);
  digitalWrite(WIFI_SLAVE_SELECT, HIGH);

  // now init dataflash
  dflash.init(FLASH_SLAVE_SELECT);

  // now init wifi
  WiFi.init();
}
I doubt anything is wrong with the library, but in your initShield and loop methods you refer to a variable called 'dflash' which does not seem to be defined anywhere.