On Ubuntu 16.04 vnc server Matlab 2016b:

System java:

openjdk version "1.8.0_292"
OpenJDK Runtime Environment (build 1.8.0_292-8u292-b10-0ubuntu1~16.04.1-b10)
OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)

Matlab java:
Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

Error:

Starting parallel pool (parpool) using the 'local' profile ... connected to 16 workers.
Undefined variable "ParforProgressMonitor" or class "ParforProgressMonitor.createServer".

Error in ParforProgMon (line 118)
            o.JavaBit   = ParforProgressMonitor.createServer( strWindowTitle, nNumIterations,
            nProgressStepSize, nWidth, nHeight );

Hi
There are many java messages shown in Matlab output repetitively when I use "ParforProgMon
". Any suggestion to get rid of these messages? Thanks.

java.net.BindException: Address already in use: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at java.net.Socket.connect(Socket.java:538) at java.net.Socket.<init>(Socket.java:434) at java.net.Socket.<init>(Socket.java:211) at ParforProgressMonitor$ProgWorker.increment(ParforProgressMonitor.java:57)

OS: Windows / Ubuntu
Matlab 2018a

Following notification is displayed when using ParforProgMon:

java.net.UnknownHostException: c040039 at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:579) at java.net.Socket.connect(Socket.java:528) at java.net.Socket.(Socket.java:425) at java.net.Socket.(Socket.java:208) at ParforProgressMonitor$ProgWorker.increment(ParforProgressMonitor.java:57)

There is a problem with the step size:

N   = 13000;
ppm = ParforProgMon('some title   ', N, floor(N/100),500, 55);
parfor f = 1:N
    pause(0.01)
    ppm.increment();
end

and it keeps going until reaches 13000%.

Starting in Matlab 2022a, I am getting the following warning:

Warning: udp will be removed in a future release. Use udpport instead.

This shows more information about the transition:
https://www.mathworks.com/help/releases/R2022a/instrument/transition-your-code-to-udpport-interface.html

Great code, FYI...

I have some code that opens and closes a window. In general, something like this:

gcp; %Make sure the parallel pool is started
num_mc = 1000;
for iter=1:3
    window_title = sprintf('MC runs, iter %d: ',iter);
    ppm = ParforProgMon(window_title, num_mc);
    parfor mc = 1:num_mc
        %Some Monte Carlo (MC) code here...
        ppm.increment();
    end
    %some outer iteration code here...
    ppm.delete();
end

About one out of 10 times, ppm.delete() will hang MATLAB. I cannot Ctrl-C out, or pause in debugging mode. The only thing that works is to kill MATLAB and restart it. I put a printf statement before and after ppm.delete() and when it crashed now, I get the before but not after, so I am pretty sure it is in the ppm.delete() code that it is hanging. Not really any more details than this though. Sorry!

OS: Windows 10
MATLAB: 2017b

Thanks!