Error 7161 Comsol

Topics 5.2a 5.2 5.1 5.0 4.4 4.3b 4.3a 4.3 4.2a 4.2 4.1 4.0a 4.0 3.5a AC/DC ModuleAcoustics ModuleCFDChemical Reaction EngineeringDefinitions and operatorsFluid FlowGeometryHeat TransferLiveLink productsMaterials and functionsMEMSMeshMicrofluidicsPhysicsResults and visualizationRF ModuleSolvingStructural Mechanics List all discussions Share this pageEmailLinkedInFacebookTwitterDeliciousDiggStumbleuponMore services... error code 7161 Topics: no topics Thread index | Previous thread | Next thread | Start a new discussion RSS feed | Turn on email notifications | 2 Replies Last post: July 12, 2010 11:38pm UTC Sicheng Zhou March 31, 2010 2:27pm UTC error code 7161 Hej, everyone I am making a simulation with Optimization Lab. And I get an error which has the code 7161 with a message "The mass matrix is zero". Can any one tell me what does this mean? Thanks. Regards. Reply | Reply with Quote | Send private message | Report Abuse Charles Reinke May 26, 2010 3:36pm UTC in response to Sicheng Zhou Re: error code 7161 I had a similar problem recently using the RF module with COMSOL 3.5a on a Linux machine where I got the "error 7161: Mass matrix is zero" message. I searched the comsol.com "Knowledge Base" for an explanation, and was referred to the Multiphysics Reference Manual. Unfortunately, there is absolutely no mention of error 7161 in the COMSOL 3.5a Multiphysics Reference Manual. What I finally figured out was that under the subdomain settings, the numerical values for the electrical conductivity (for materials I had loaded from COMSOL's materials library) contained non-numerical characters indicating the units, e.g., "1E-6[S/m]". Basically, after removing those characters, i.e. just making them all "0" (since I really didn't care about the electrical conductivity for my application), the simulation ran fine. However, it was not actually that simple, since I had to de-select the materials loaded from the library and then enter the values by had for the various materials, and even after removing the "[S/m]" characters, I would get an "error 7111: SIngular matrix" for any non-zero values, so this still could be a problem if I ever need a nonzero electrical conductivity. I'm not sure if this is just a materials library issue with the Linux version of COMSOL 3.5a, or if the bug is more pervasive than that. The way this was discovered was from the stack trace of the error message. When the error message pops up, there is a little button on the dialog box called "Details >>". If you hit that, it shows you some information about what is going wrong, including a section called "Stack trace". In my ca

this content in your HTML Search confirm cancel Report adult content: click to rate: Account: (login) More Channels Showcase RSS Channel Showcase 2221788 RSS Channel Showcase 2723572 RSS Channel Showcase 2689001 RSS Channel Showcase 1310609 Channel Catalog Subsection Catalog Articles on this Page (showing articles 2321 to 2340 of 15558) 08/31/10--10:45: _Error with mesh change 04/01/11--06:12: _Hyperelastic Materi... 10/16/12--05:21: _Eigenvalue analysis... 02/04/13--02:55: _"Failed http://www.comsol.com/community/forums/general/thread/4351/ to compute ... 03/12/13--06:59: _Error: 7161 The mas... 03/15/13--13:23: _how can I use plast... 03/18/13--11:02: _Richard's Equation ... 04/08/13--01:06: _Evaluation of Volum... 04/14/13--00:09: _rf mems switch desi... 04/14/13--01:27: _why does deformatio... 04/14/13--02:55: _out of memory durin... 04/14/13--10:03: _contact modeling an... 09/12/11--14:58: _Question about Nern... 12/05/11--12:18: _charged particle de... 07/24/12--01:46: http://phonophotoscopic3.rssing.com/chan-3365846/all_p117.html _partical tracing ne... 10/25/12--07:17: _Scttering problem u... 04/02/13--18:15: _the free vibration ... 04/04/13--00:53: _2D coplanar wavegui... 04/15/13--10:21: _Weak Form Modeling ... 04/15/13--13:21: _Internal error in g... (showing articles 2321 to 2340 of 15558) Browse the Latest Snapshot Browsing All Articles (15558 Articles) Live Browser Channel Description: Most recent forum discussions older | 1 | .... | 114 | 115 | 116 | (Page 117) | 118 | 119 | 120 | .... | 778 | newer 0 0 08/31/10--10:45: Error with mesh change Contact us about this article I made a simple eigenfrequency study with a beam using a Free Tetrahedral mesh and it worked fine. But, when I change the mesh type to Mapped and define the size of elements to 5mm, I received an error saying that my Mass Matrix is zero. Why? I'm attaching my file. Thanks a lot. 0 0 04/01/11--06:12: Hyperelastic M

this content in your HTML Search confirm cancel Report adult content: click to rate: Account: (login) More Channels Showcase RSS http://phonoscope3.rssing.com/chan-3365850/all_p117.html Channel Showcase 6453135 RSS Channel Showcase 4744022 RSS Channel Showcase 6270226 RSS Channel Showcase 8516938 Channel Catalog Subsection Catalog Articles on this Page (showing articles 2321 to 2340 http://phonologists4.rssing.com/chan-3365828/all_p259.html of 15497) 04/12/13--23:25: _Measuring the tempe... 04/13/13--11:46: _Failed to evaluate ... 04/13/13--13:12: _Scatterer on substr... 03/03/10--08:56: _Moving items relati... 04/26/10--00:53: _Mapped mesh in 3D 08/31/10--10:45: _Error with mesh error 7161 change 04/01/11--06:12: _Hyperelastic Materi... 10/16/12--05:21: _Eigenvalue analysis... 02/04/13--02:55: _"Failed to compute ... 03/12/13--06:59: _Error: 7161 The mas... 03/15/13--13:23: _how can I use plast... 03/18/13--11:02: _Richard's Equation ... 04/08/13--01:06: _Evaluation of Volum... 04/14/13--00:09: _rf mems switch desi... 04/14/13--01:27: _why does deformatio... 04/14/13--02:55: _out of memory durin... 04/14/13--10:03: _contact modeling an... 09/12/11--14:58: _Question about Nern... 12/05/11--12:18: _charged particle de... error 7161 comsol 07/24/12--01:46: _partical tracing ne... (showing articles 2321 to 2340 of 15497) Browse the Latest Snapshot Browsing All Articles (15497 Articles) Live Browser Channel Description: Most recent forum discussions older | 1 | .... | 114 | 115 | 116 | (Page 117) | 118 | 119 | 120 | .... | 775 | newer 0 0 04/12/13--23:25: Measuring the temperature at a point Contact us about this article Sir, In a non-isothermal pipe flow model, we have specified wall heat transfer with external temperature as 293.15K and the check box for taking average from adjacent domains is also checked. After solving, the 3D temperature plot for pipes shows 293.15K, however if we try to point evaluate at the exit of the pipe, it is giving the value close to 313K. We are not able to know why the variation is occuring. Can someone comment on this issue? 0 0 04/13/13--11:46: Failed to evaluate variable in particle tracing module Contact us about this article Hello! I'm trying to

Embed this content in your HTML Search confirm cancel Report adult content: click to rate: Account: (login) More Channels Showcase RSS Channel Showcase 7740928 RSS Channel Showcase 6065636 RSS Channel Showcase 6247299 RSS Channel Showcase 8504216 Channel Catalog Subsection Catalog Articles on this Page (showing articles 5161 to 5180 of 15466) 03/13/14--20:46: _Directional Coupler 03/14/14--02:09: _Hi, I wonder how to... 03/14/14--04:49: _Laser Heat transfer 03/14/14--07:04: _Fixed Beam Deflection 03/14/14--08:15: _Help needed with Co... 09/04/13--01:53: _Load or Temperature... 03/14/14--19:35: _How setup a current... 03/14/14--22:48: _Assigning Colors to... 03/14/14--22:48: _Assigning Colors to... 03/15/14--06:38: _Voltage output for ... 03/15/14--09:42: _Dynamic stiffness o... 03/15/14--10:51: _Heat Transfer in air 04/15/12--00:21: _Frequency domain - ... 03/12/13--06:59: _Error: 7161 The mas... 03/11/14--08:43: _Plotting local surf... 03/13/14--19:34: _Smaller element siz... 03/16/14--01:56: _Model Hall effect i... 03/16/14--01:56: _Model Hall effect i... 03/16/14--06:57: _comsol generates a ... 03/16/14--08:19: _Material Properties... (showing articles 5161 to 5180 of 15466) Browse the Latest Snapshot Browsing All Articles (15466 Articles) Live Browser Channel Description: Most recent forum discussions older | 1 | .... | 256 | 257 | 258 | (Page 259) | 260 | 261 | 262 | .... | 774 | newer 0 0 03/13/14--20:46: Directional Coupler Contact us about this article I am trying to model a directional coupler in 2D. I get the following error Undefined value found. - Detail: Undefined value found in the equation residual vector. There are 1 degrees of freedom giving NaN/Inf in the vector for the variable comp1.ewbe.S1x. at coordinates: (0,0), ... There are 1 degrees of freedom giving NaN/Inf in the vector for the variable comp1.ewbe.S2x. at coordinates: (0,0), ... There are 1 degrees of freedom giving NaN/Inf in the vector for the variable comp1.ewbe.S3x. at coordinates: (0,0), ... What does this error mean? 0 0 03/14/14--02:09: Hi, I wonder how to set the solvers. Contact us about this article Hi, I got the mail box following Error: Failed to find a solution: Maximum number of Newton iterations reached. Returned solution has not converged. So I wonder what the set of solver is suitable. This is my setting. GMRES Incomplet