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COMSOL with matlab cannot use "model.sol('sol1').run; "

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DERA All, I use COMSOL with matlab to run my model with a for-loop (change some parameters every time) . About three month ago, I can use "model.sol('sol1').run; " to run my model. However, today, it is useless, and, the problem described by Matlab is bellow:

错误使用 test_para (line 25)
Java exception occurred:
Exception:
    com.comsol.util.exceptions.FlException: No current feature assigned
Messages:
    No current feature assigned
Stack trace:
    at com.comsol.model.dbmodel.SolverSequenceDb.current(SourceFile:196)
    at com.comsol.model.method.SolverSequenceMethod.doRun(SourceFile:2711)
    at com.comsol.model.dbmodel.SolverSequenceDb.run(SourceFile:186)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.comsol.bridge.command.b.a(SourceFile:145)
    at com.comsol.bridge.command.b.run(SourceFile:90)
    at com.comsol.bridge.command.i.execute(SourceFile:45)
    at com.comsol.bridge.command.j.d(SourceFile:711)
    at com.comsol.bridge.command.j.a(SourceFile:699)
    at com.comsol.bridge.command.j$3.a(SourceFile:600)
    at com.comsol.bridge.command.j$3.call(SourceFile:1)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

And here is my code:

import com.comsol.model.*
import com.comsol.model.util.*
fp = fopen('run_log.txt','a+');
for x1 = 0.8 : 0.05 : 0.9
    for x2 = 1 : 0.5 : 2     
        for x3 = 0.1 : 0.5 : 2.1
            disp(strcat('f = ',num2str(x1)));
            fprintf(fp, '%s\n',strcat('f = ',num2str(x1)));
            disp(strcat('ra = ',num2str(x2)));
            fprintf(fp, '%s\n',strcat('ra = ',num2str(x2)));
            disp(strcat('ha = ',num2str(x3)));
            fprintf(fp, '%s\n',strcat('ha = ',num2str(x3)));
            disp(datetime)
            fprintf(fp, '%s\n',datetime);            
            model = mphload("curve_threePointMem.mph");
            model.param.set('f',num2str(x1));
            model.param.set('ra',num2str(x2));
            model.param.set('ha',num2str(x3));         
            model.sol('sol1').run;
            coefficient = mphglobal(model,'Alpha');
            total = 0;
            for i = 1 : 59
                total = total + (coefficient(i) + coefficient(i + 1));
            end
            z = -(0.5 * total) / 59;
            disp(strcat('Average Absorption Coefficient= ',num2str(-z)));
            fprintf(fp, '%s\n',strcat('Average Absorption Coefficient= ',num2str(-z)));
            disp("-----------------------------");
            fprintf(fp, '%s\n',"-----------------------------");
        end
    end
end
fclose(fp);

my version is COMSOL Multiphysics 5.4.0.388


2 Replies Last Post 16 Mar 2020, 22:48 GMT-4

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Posted: 7 months ago 16 Mar 2020, 12:05 GMT-4
Updated: 7 months ago 16 Mar 2020, 12:06 GMT-4

Hiya,

Try model.study('std1').run

Hope this helps

Sinéad

Hiya, Try model.study('std1').run Hope this helps Sinéad

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Posted: 7 months ago 16 Mar 2020, 22:48 GMT-4

Dear Sinéad Mannion, It seems useful to use model.study('std1').run, but are their functions the same? And do you know why the problem occur? I was confused because three month ago it is useful. Thank you very much!

Dear Sinéad Mannion, It seems useful to use model.study('std1').run, but are their functions the same? And do you know why the problem occur? I was confused because three month ago it is useful. Thank you very much!

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