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Matlab with Comsol
Posted 29 avr. 2017, 11:58 UTC−4 Interfacing, Studies & Solvers Version 5.2a 2 Replies
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Hello everyone.
I am new to Comsol and Im trying to automate some measurements via matlab, by changing few parameters and exporting results to txt (from matlab), but i actually faced a problem on the begining. After loading a model and changing parameter i cant get a new solution (run procedure is not working).
Q. Do anyone know why this situation occured and have solution for it?
Here is the code :
model11 = mphload('path')
model11.param.set('wdef', '6[mm]');
% model11.study('std2').run;
model11.study('std2').run(); % i tried both methods and they dont work
mphplot(model11,'pg2')
model11.param.set('hdef', '2[mm]');
figure(2)
mphplot(model11,'pg2')
And there is a error :
Error using model1 (line 5)
Java exception occurred:
Exception:
com.comsol.util.exceptions.FlException: java.lang.NullPointerException
Messages:
java.lang.NullPointerException
Stack trace:
at com.comsol.model.selections.SelectionMethod.assocUpdate(SourceFile:1133)
at com.comsol.model.selections.LocalSelectionMethod.assocUpdate(SourceFile:55)
at com.comsol.model.internal.impl.SelectionImpl.assocUpdateThis(SourceFile:1152)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:900)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.GeomSequenceMethod.updateSelectionsAfterFinGeomChange(SourceFile:200)
at com.comsol.model.internal.impl.GeomSequenceImpl.updateSelectionsAfterFinGeomChange(SourceFile:4357)
at com.comsol.model.method.GeomSequenceMethod.setGeomAndAssoc(SourceFile:2478)
at com.comsol.model.internal.impl.GeomSequenceImpl.a(SourceFile:4349)
at com.comsol.model.internal.impl.GeomSequenceImpl.setGeomAndAssoc(SourceFile:3541)
at com.comsol.model.method.GeomSequenceMethod.setGeomFromLastActiveFeature(SourceFile:2497)
at com.comsol.model.method.GeomSequenceMethod.build(SourceFile:1956)
at com.comsol.model.method.GeomSequenceMethod.b(SourceFile:1827)
at com.comsol.model.method.GeomSequenceMethod.run(SourceFile:1748)
at com.comsol.model.internal.impl.GeomSequenceImpl.ap(SourceFile:4099)
at com.comsol.model.internal.impl.GeomSequenceImpl.run(SourceFile:3236)
at com.comsol.model.method.ModelMethod.multiphysics(SourceFile:927)
at com.comsol.model.internal.impl.ModelImpl.a(SourceFile:4826)
at com.comsol.model.internal.impl.ModelImpl.multiphysics(SourceFile:4078)
at com.comsol.model.method.SolverSequenceMethod.doCreateAutoSequence(SourceFile:2432)
at com.comsol.model.internal.impl.SolverSequenceImpl.k(SourceFile:3792)
at com.comsol.model.internal.impl.SolverSequenceImpl.createAutoSequence(SourceFile:984)
at com.comsol.model.method.StudyMethod.b(SourceFile:333)
at com.comsol.model.method.StudyMethod.doCreateAutoSequences(SourceFile:228)
at com.comsol.model.method.StudyMethod.doRun(SourceFile:51)
at com.comsol.model.internal.impl.StudyImpl.c(SourceFile:349)
at com.comsol.model.internal.impl.StudyImpl.a(SourceFile:348)
at com.comsol.model.internal.impl.StudyImpl$1.a(SourceFile:328)
at com.comsol.model.internal.impl.StudyImpl$1.execute(SourceFile:1)
at com.comsol.model.clientserver.ClientManager$1.call(SourceFile:169)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
I would be grateful, if someone can help me with this issue.
I am new to Comsol and Im trying to automate some measurements via matlab, by changing few parameters and exporting results to txt (from matlab), but i actually faced a problem on the begining. After loading a model and changing parameter i cant get a new solution (run procedure is not working).
Q. Do anyone know why this situation occured and have solution for it?
Here is the code :
model11 = mphload('path')
model11.param.set('wdef', '6[mm]');
% model11.study('std2').run;
model11.study('std2').run(); % i tried both methods and they dont work
mphplot(model11,'pg2')
model11.param.set('hdef', '2[mm]');
figure(2)
mphplot(model11,'pg2')
And there is a error :
Error using model1 (line 5)
Java exception occurred:
Exception:
com.comsol.util.exceptions.FlException: java.lang.NullPointerException
Messages:
java.lang.NullPointerException
Stack trace:
at com.comsol.model.selections.SelectionMethod.assocUpdate(SourceFile:1133)
at com.comsol.model.selections.LocalSelectionMethod.assocUpdate(SourceFile:55)
at com.comsol.model.internal.impl.SelectionImpl.assocUpdateThis(SourceFile:1152)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:900)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.ModelEntityMethod.assocUpdate(SourceFile:895)
at com.comsol.model.method.GeomSequenceMethod.updateSelectionsAfterFinGeomChange(SourceFile:200)
at com.comsol.model.internal.impl.GeomSequenceImpl.updateSelectionsAfterFinGeomChange(SourceFile:4357)
at com.comsol.model.method.GeomSequenceMethod.setGeomAndAssoc(SourceFile:2478)
at com.comsol.model.internal.impl.GeomSequenceImpl.a(SourceFile:4349)
at com.comsol.model.internal.impl.GeomSequenceImpl.setGeomAndAssoc(SourceFile:3541)
at com.comsol.model.method.GeomSequenceMethod.setGeomFromLastActiveFeature(SourceFile:2497)
at com.comsol.model.method.GeomSequenceMethod.build(SourceFile:1956)
at com.comsol.model.method.GeomSequenceMethod.b(SourceFile:1827)
at com.comsol.model.method.GeomSequenceMethod.run(SourceFile:1748)
at com.comsol.model.internal.impl.GeomSequenceImpl.ap(SourceFile:4099)
at com.comsol.model.internal.impl.GeomSequenceImpl.run(SourceFile:3236)
at com.comsol.model.method.ModelMethod.multiphysics(SourceFile:927)
at com.comsol.model.internal.impl.ModelImpl.a(SourceFile:4826)
at com.comsol.model.internal.impl.ModelImpl.multiphysics(SourceFile:4078)
at com.comsol.model.method.SolverSequenceMethod.doCreateAutoSequence(SourceFile:2432)
at com.comsol.model.internal.impl.SolverSequenceImpl.k(SourceFile:3792)
at com.comsol.model.internal.impl.SolverSequenceImpl.createAutoSequence(SourceFile:984)
at com.comsol.model.method.StudyMethod.b(SourceFile:333)
at com.comsol.model.method.StudyMethod.doCreateAutoSequences(SourceFile:228)
at com.comsol.model.method.StudyMethod.doRun(SourceFile:51)
at com.comsol.model.internal.impl.StudyImpl.c(SourceFile:349)
at com.comsol.model.internal.impl.StudyImpl.a(SourceFile:348)
at com.comsol.model.internal.impl.StudyImpl$1.a(SourceFile:328)
at com.comsol.model.internal.impl.StudyImpl$1.execute(SourceFile:1)
at com.comsol.model.clientserver.ClientManager$1.call(SourceFile:169)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
I would be grateful, if someone can help me with this issue.
2 Replies Last Post 2 mai 2017, 07:32 UTC−4
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Posted:
8 years ago
Hi
Is it this line that fails "model11.study('std2').run(); "?
Do you have other studies in the model? If yes, is 'std2' depending on the results from other studies?
What version of Comsol are you using? Can you post your model or send it to support@comsol.com ?
--
Lars Gregersen
Comsol Denmark
Is it this line that fails "model11.study('std2').run(); "?
Do you have other studies in the model? If yes, is 'std2' depending on the results from other studies?
What version of Comsol are you using? Can you post your model or send it to support@comsol.com ?
--
Lars Gregersen
Comsol Denmark
Please login with a confirmed email address before reporting spam
Posted:
8 years ago
Thank you for reply Mr.
Yes, exactly this line.
I have only one study(std2), which consists two steps - stationary and coil geometry analysis. Im gonna send model via support, cause its quite big.
Im using comsol 5.2a.
Yes, exactly this line.
I have only one study(std2), which consists two steps - stationary and coil geometry analysis. Im gonna send model via support, cause its quite big.
Im using comsol 5.2a.