MATLAB: Do I receive an error 5 when trying to return a borrowed product early

borrowearlyreturn

When I try to return a borrowed product, why does it gives me an error 5 in the borrow interface and fail to return the borrowed key?

Best Answer

This can happen if the license file has been changed on the license server. Changing the license file on the server wipes out all the data about borrowed keys. So when it is upgraded from 17a to 17b all borrowed sessions are returned. However, all the clients still have local borrow data that works, but the keys won't return since the server isn't aware of them.

To successfully return the borrow key, you'll need to delete either the flexlmborrow file (Unix) or the registry key (Windows):

Windows

------

registry key: HKEY_CURRENT_USER\Software\FLEXlm License Manager\Borrow

Unix

-------

file: ~/.flexlmborrow

Once the borrow key is gone, you will be able to borrow again.

Related Solutions

MATLAB: Do I get “error 2” when returning a borrowed license

If there is another, invalid license on the search path, returning the borrow key will give you an error 2. The server sees the toolbox as returned, but the client holds on to the key. Removing the invalid license should resolve it.

MATLAB: Any trick to stop fminsearch early

Yes, there is, you can pass an output function and change the optimization state as soon as your error gets the threshold that you want. Here is a very simple example adapated from the one at mathworks (https://de.mathworks.com/help/matlab/math/output-functions.html) that does what you want and it is also very useful to visualize the stop criteria working:

function [x fval historyT] = myproblem(x0)
    historyT = [];
    options = optimset('OutputFcn', @myoutput);
    [x fval] = fminsearch(@objfun, x0,options);
        
    function stop = myoutput(x,optimvalues,state);
        stop = false;
        
        % This block here 

        AcceptableError = 0.02;
        if optimvalues.fval<AcceptableError
            state = 'done';
        end
        
        if isequal(state,'iter')
          historyT = [historyT; x];
        end
    end
    
    function z = objfun(x)
      z = exp(x(1))*(4*x(1)^2+2*x(2)^2+x(1)*x(2)+2*x(2));
    end
end

If I then call the funciton, I get:

[x fval history] = myproblem([-1 1])
size(history,1)
ans =
    15

While if I comment the stop criteria:

        % This block here 
%         AcceptableError = 0.02;
%         if optimvalues.fval<AcceptableError
%             state = 'done';
%         end
[x fval history] = myproblem([-1 1])
size(history,1)
ans =
    48

Best Answer

Related Solutions

MATLAB: Do I get “error 2” when returning a borrowed license

MATLAB: Any trick to stop fminsearch early

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