OVF in serial monitor instead of data

Question

I am currently working with two Arduinos and I'm trying to synchronize them. I want to get data from four LIS3DH accelerometers. The LIS3DH accelerometers are connected to the Arduino using I2C interface. I have managed to get the Arduinos to synchronize using SPI but when I get the third set of data it keeps on showing OVF rather than the values. My code is below can someone please help me out?

Thanks

// SPI Master
#include <Wire.h>
#include <SPI.h>
#include "SPI_anything.h"
#include <Adafruit_LIS3DH.h>
#include <Adafruit_Sensor.h>
//#define LIS3DH_CLK 13
//#define LIS3DH_MISO 12
//#define LIS3DH_MOSI 11
//#define LIS3DH_CS 10
// I2C
Adafruit_LIS3DH lisch1 = Adafruit_LIS3DH();
Adafruit_LIS3DH lisch2 = Adafruit_LIS3DH();
// Adafruit_LIS3DH lisch3 = Adafruit_LIS3DH();
struct event3;
#if defined(ARDUINO_ARCH_SAMD)
// for Zero, output on USB Serial console, remove line below if using
// programming port to program the Zero!
#define Serial SerialUSB
#endif
void setup() {
#ifndef ESP8266
 while (!Serial)
 ; // will pause Zero, Leonardo, etc until serial console opens
#endif
 Serial.begin(9600);
 // have to send on master in, *slave out*
 pinMode(MISO, OUTPUT);
 // turn on SPI in slave mode
 SPCR |= _BV(SPE);
 Serial.println("LIS3DH test!");
 if (!lisch1.begin(0x19)) { // change this to 0x19 for alternative i2c address
 // - Voltage SDO
 Serial.println("Couldnt start");
 while (1)
 ;
 }
 Serial.println("LIS3DH1 found!");
 if (!lisch2.begin(0x18)) { // change this to 0x18 for alternative i2c address
 // - Ground SDO
 Serial.println("Couldnt start");
 while (1)
 ;
 }
 Serial.println("LIS3DH2 found!");
 lisch1.setRange(LIS3DH_RANGE_16_G); // 2, 4, 8 or 16 G!
 lisch2.setRange(LIS3DH_RANGE_16_G); // 2, 4, 8 or 16 G!
 Serial.print("Range = ");
 Serial.print(2 << lisch1.getRange());
 Serial.print("Range = ");
 Serial.print(2 << lisch2.getRange());
 Serial.println("G");
}
void loop() {
 lisch1.read(); // get X Y and Z data at once
 /* Or....get a new sensor event, normalized */
 sensors_event_t event;
 lisch1.getEvent(&event);
 /* Display the results (acceleration is measured in m/s^2) */
 Serial.print(" \t ");
 Serial.print(event.acceleration.x);
 Serial.print(" \t ");
 Serial.print(event.acceleration.y);
 Serial.print(" \t ");
 Serial.print(event.acceleration.z);
 lisch2.read(); // get X Y and Z data at once
 lisch2.getEvent(&event);
 /* Display the results (acceleration is measured in m/s^2) */
 Serial.print(" \t ");
 Serial.print(event.acceleration.x);
 Serial.print(" \t ");
 Serial.print(event.acceleration.y);
 Serial.print(" \t ");
 Serial.print(event.acceleration.z);
 struct event;
 SPI_readAnything(event);
 // sensors_event_t event;
 // lisch3.getEvent(&event);
 Serial.print(" \t "); Serial.print(float2s(event.acceleration.x,6);
 Serial.print(" \t "); Serial.print(event.acceleration.y); 
 Serial.print(" \t "); Serial.print(event.acceleration.z);
 Serial.println ();
 delay(500);
}
/ SPI Slave
#include <Wire.h>
#include <SPI.h>
#include "SPI_anything.h"
#include <Adafruit_LIS3DH.h>
#include <Adafruit_Sensor.h>
#define LIS3DH_CLK 13
#define LIS3DH_MISO 12
#define LIS3DH_MOSI 11
#define LIS3DH_CS 10
 // I2C
 Adafruit_LIS3DH lisch3 = Adafruit_LIS3DH();
#if defined(ARDUINO_ARCH_SAMD)
// for Zero, output on USB Serial console, remove line below if using
// programming port to program the Zero!
#define Serial SerialUSB
#endif
void setup() {
#ifndef ESP8266
 while (!Serial)
 ; // will pause Zero, Leonardo, etc until serial console opens
#endif
 Serial.begin(9600); // start serial for output
 SPI.begin();
 // Slow down the master a bit
 SPI.setClockDivider(SPI_CLOCK_DIV8);
 Serial.println("LIS3DH3 test!");
 if (!lisch3.begin(0x19)) { // change this to 0x19 for alternative i2c address
 // - Voltage SDO
 Serial.println("Couldnt start");
 while (1)
 ;
 }
 Serial.println("LIS3DH3 found!");
 lisch3.setRange(LIS3DH_RANGE_16_G); // 2, 4, 8 or 16 G!
 Serial.print("Range = ");
 Serial.print(2 << lisch3.getRange());
 Serial.println("G");
}
void loop() {
 lisch3.read(); // get X Y and Z data at once
 /* Or....get a new sensor event, normalized */
 sensors_event_t event;
 lisch3.getEvent(&event);
 /* Display the results (acceleration is measured in m/s^2) */
 Serial.print(" \t ");
 Serial.print(event.acceleration.x);
 Serial.print(" \t ");
 Serial.print(event.acceleration.y);
 Serial.print(" \t ");
 Serial.print(event.acceleration.z);
 Serial.println();
 digitalWrite(SS, LOW); // SS is pin 10
 SPI_writeAnything(event);
 digitalWrite(SS, HIGH);
 // delay (1000); // for testing
 delay(100);
}

Answer 1

OVF means overflow, you probably exceeded the range of the data type you're using. Try /1000; /10000000000 etc to your variable until you don't get the OVF or use a datatype with a bigger range.