No library found for processing.io error error when running Processing code in raspberrypi

Question

I am trying to run a Sketch program using Processing 4.0. The code is from FreeNove raspberrypi kit.

I am getting this error

No library found for processing.io
No library found for processing.io
No library found for processing.io
Libraries must be installed in a folder named 'libraries' inside the sketchbook folder (see the Preferences window).
The package "processing.io" does not exist. You might be missing a library.

The code is snippt which seem to include processing.io is

/*****************************************************
 * Filename : Sketch_09_1_1_Motor
 * Description : Control speed and direction of the motor
 * auther : www.freenove.com
 * modification: 2016年08月22日
 *****************************************************/
import processing.io.*;
int motorPin1 = 17; //connect to the L293D
int motorPin2 = 27;
int enablePin = 22;
final int borderSize = 45; //border size 

Answer 1

I know I’m late, however, responding just in case someone else has the same issue.

Seems that the Hardware I/O library isn’t enabled by default for your sketches in Processing V4.

The following resolved it for me – using Processing 4.0.1 Arm 32;

• Start Processing
• In the Processing UI, go to: Tools > Manage tools
• Click Tab: Libraries
• Filter: All
• Search for: Hardware I/O
• Click Install