comsol错误提⽰及解决⽅法
鲁迅原名什么字什么名字Diagnostics : Error Messages
Error Messages
This ction summarizes the most common error messages and solver messages generated by COMSOL Multiphysics. All error messages are numbered and sorted in different categories according to the following table.
TABLE 2-1: ERROR MESSAGE CATEGORIES防震减灾手抄报内容
NUMBERS CATEGORY
1000–1999 Importing Models
2000–2999 Geometry Modeling
3000–3999 CAD Import
4000–4999 Mesh Generation
5000–5999 Point, Edge, Boundary, and Subdomain
Specification
6000–6999 Asmbly and Extended Mesh
7000–7999 Solvers
8000–8999 Postprocessing
9000–9999 General
For error messages that do not appear in the following lists, contact COMSOL’s support team for help.
2000–2999 Geometry Modeling
TABLE 2-2: GEOMETRY MODELING ERROR MESSAGES
ERROR
NUMBER
ERROR MESSAGE EXPLANATION
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2118 Negative output from
empty input
Incorrect Geometry M-file.
2119 Non scalar output from
empty input
Incorrect Geometry M-file.
2120 Normal directions are
inconsistent
Incorrect input data from STL/VRML import.
2138 Self interctions not
supported Curves resulting in lf-interctions are not supported.
2140 Singular extrusions not
supported
Error in input parameters.
2141 Singular revolutions not
supported The revolved mesh has a singularity at the z axis. If possible, create the cylinder using a 3D primitive or by revolving the geometry before meshing.
2146 Subdomain must
bounded at least four
boundary gments
Incorrect geometry for mapped mesh.
2147 Subdomain must bound
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component only
Incorrect geometry for mapped mesh. 2190 Invalid radius or distance Incorrect input parameters to fillet/chamfer.
2197 Operation resulted in
empty geometry object Geometry operation resulted in an empty geometry object which is not allowed. Make sure an empty geometry object is not created.
2209 Geometry to revolve may
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revolution The axis of revolution and the geometry interct. Check the dimension of the geometry and the definition of the axis for the revolution.
抗疫金句4000–4999 Mesh Generation TABLE 2-3: MESH GENERATION ERROR MESSAGES
ERROR
NUMBER
ERROR MESSAGE EXPLANATION
4002 A degenerated
tetrahedron was
created The mesh generator ran into numerical difficulties while creating tetrahedrons with a size bad on ur-controlled parameters. Caus could be too small and narrow subdomains relative to the rest of the geometry or exceedingly short boundary gments. Try to avoid creating small and narrow subdomains and very short boundary gments that are adjacent to longer boundary gments.
4003 A degenerated
triangle was
created The mesh generator ran into numerical difficulties while creating triangles with a size bad on ur-controlled parameters. Caus could be too small and narrow subdomains relative to the rest of the geometry or exceedingly short boundary gments. Try to avoid creating small and narrow subdomains and very short boundary gments that are adjacent to longer boundary gments.
4012 Cannot create
mapped mesh for
this geometry The geometry does not fulfill the topological requirements for a mapped mesh. Changes in input parameters or further subdomain division can possibly help this.
4026 Failed create
matching edge
discretizations Cannot make mapped mesh with the given input parameters.
4029 Failed to inrt
point Problems inrting point at given coordinate. Manually inrting a point there may help.
4031 Failed to respect
boundary element
on geometry edge The mesh generator failed in making the elements compatible with the geometry object’s edges. The reason for this could be that the face mesh is too coar or contains adjacent elements with large differences in scale. Another reason can be that some subdomains in the geometry are too narrow with respect to the rest of the geometry.
4032 Failed to respect
boundary element
on geometry face
See Error message 4031.
4044 Internal error
boundary
respecting
See Error message 4031.
4054 Invalid topology of
geometry The geometry object cannot be ud for creating a mapped mesh. It must be subdivided.
4055 Isolated entities
found Entities that are not connected to the boundaries of a geometry objects is found. The mapped mesh generator does not support such isolated entities.
4119 Singular edge
detected
The geometry object contains an edge of zero length. 6000–6999 Asmbly and Extended Mesh
TABLE 2-4: ASSEMBLY AND EXTENDED MESH ERROR MESSAGES
ERROR
NUMBER
ERROR MESSAGE EXPLANATION
6008 Circular
variable
dependency
detected A variable has been defined in terms of itlf, possibly in a circular chain of expression variables. Make sure that variable definitions are sound. Be cautious with equation variables in equations.
6063 Invalid degree
of freedom
name The software does not recognize the name of a degree of freedom. Check the names of depe
ndent variables that you have entered for the model. See also Error 7192.
6139 Wrong number
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of DOFs in
initial value The current solution or the stored solution has for some reason the wrong number of degrees of freedom, sometimes due to a change of the implementation of elements between two versions of the software. To overcome the problem, go to the Initial value area in the Solver Manager, and lect Initial value expression. Then the initial value expressions is evaluated without using the current or stored solution.
6140 Wrong number
of dofs in
linearization
point The current solution or the stored solution has for some reason the wrong number of degrees of freedom, sometimes due to a change of the implementation of elements between two versions of t
he software. To overcome the problem, go to the Value of variables not solved for and linearization point area in the Solver Manager, and click the U tting from Initial value frame button or the Zero button.
6163 Divide by zero A property in the model contains a divisor that becomes zero.
Check to make sure that division by zero does not occur in
any expression or coefficient.
6164 Duplicate
variable name A variable name has two different definitions. For instance, the same variable name appears two or more times for a dependent variable, a constant, an expression variable, or a
coupling variable. Remove or rename one of the variables.
6170 Failed to
evaluate
variable An error occurred when evaluating the variable. The domains in which COMSOL Multiphysics tried to evaluate the variable are indicated. Also, the error message shows the expression that COMSOL Multiphysics was unable to evaluate. Make sure that you have defined the variables correctly in the indicated domains.
6176 Attempt to
evaluate real
logarithm of
negative number An expression contains log(a), where a becomes negative or zero. To make the logarithm well-defined, make sure that a>0. Often, a becomes only slightly negative (due to approximations in the solution process). Then, a possible solution is to u log(a+e), where e is a small constant. Another remedy is to u log(abs(a)). If you do want to have a complex logarithm, go to the Advanced tab of Solver Parameters and lect the U complex functions with real input check box.
放假通知模板6177 Matrix has zero
on diagonal When the equations have a structure such that the stiffness matrix (Jacobian matrix) has zeros on the diagonal, it is not possible to u the following linear system
solvers/preconditioners/smoothers: all versions of SOR and Diagonal scaling (Jacobi). Try the Vanka
preconditioner/smoother instead.
6188 Out of memory
during asmbly The software ran out of memory during asmbly of the finite element model. See error 7144 regarding general
memory-saving tips.
6194 Attempt to
evaluate
non-integral
power of
negative number An expression contains a^b, where a becomes negative and b is not an integer. To make the power well-defined, make sure that a>0. Often, a becomes only slightly negative (due to approximations in the solution process). Then, a possible solution is to u (a+e)^b, where e is a small constant. Another remedy is to u abs(a)^b. If you do want to have a complex number a^b, go to the Advanced tab of Solver Parameters and lect U complex functions with real input.
6199 Attempt to
evaluate real
square root of
negative number The model contains a sqrt (square root) function that takes the square root of a negative number. Either make sure that the square-root argument is nonnegative or lect the U complex functions with real input check box on the Advanced tab in the Solver Parameters dialog box.
6204 Undefined
function call An expression contains an undefined function name. Check that the function name is co
rrect and that the function is in COMSOL Multiphysics’ or MATLAB’s path.
6206 Internal
evaluation error:
unexpected NaN
encountered Not-A-Number (NaN) appears unexpectedly. A possible cau is improperly defined coupling variables. As a first step, check that the definitions of the source and destination domains of any coupling variables or periodic boundary conditions are correct.
6245 Unsupported
integration order Integration order is too high. For triangular elements the order can be up to 10, and for tetrahedral elements the order can be up to 8. Find more information in the ction “Numerical Quadrature” on page 505.
6259 Failed to
evaluate
variable
Jacobian An error occurred when evaluating the Jacobian of the indicated variable. The domains in which COMSOL Multiphysics tried to evaluate the variable are indicated. Make sure that you have defined the variable correctly in the indicated domains.
7000—7999 Solvers and Preconditioners TABLE 2-5: SOLVER ERROR MESSAGES
ERROR
NUMBER
ERROR MESSAGE EXPLANATION
7001 Adaption only
implemented for It is only possible to u adaptive mesh refinement in 3D for models using tetrahedral mesh elements. tetrahedral meshes Either turn off adaptive mesh refinement or switch
