错误提示及解决方法.doc

Error MessagesThis section summarizes the most common error messages and solver messages generated by COMSOL Multiphysics. All error messages are numbered and sorted in different categories acc or ding to the following table.TABLE 2-1: ERROR MESSAGE CATEGORIESNUMBERSCATEGORY1000—1999Importing Models2000-2999Geometry Modeling3000-3999CAD Import4000-4999Mesh Generation5000-5999Point, Edge, Boundary, and Subdomain Specification6000-6999Assembly and Extended Mesh7000-7999Solvers8000-8999Postprocessing9000-9999GeneralFor error messages that do not appear in the following lists, contact COMSOL's support team for help.2000 -999 Geometry ModelingTABLE 2-2: GEOMETRY MODELING ERROR MESSAGESERRORNUMBERERROR MESSAGEEXPLANATION2118Negative output from empty inputIncorrect Geometry M-file.2119Non scalar output from empty inputIncorrect Geometry M-file.2120Normal directions are inconsistentIncorrect input data from STL/VRML import.2138Self intersections not supportedCurves resulting in self-intersections are not supported.2140Singular extrusions not supportedError in input parameters.2141Singular revolutions not supportedThe 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.2146Subdomain must bounded at least four boundary segmentsIncorrect geometry for mapped mesh.2147Subdomain must bound one connected edge component onlyIncorrect geometry for mapped mesh.2190Invalid radius or distanceIncorrect input parameters to fillet/chamfer.2197Operation resulted in empty geometry objectGeometry operation resulted in an empty geometry object which is not allowed. Make sure an empty geometry object is not created.2209Geometry to revolve may not cross axis of revolutionThe axis of revolution and the geometry intersect. Check the dimension of the geometry and the definition of the axis for the revolution.4000 -999 Mesh GenerationTABLE 2-3: MESH GENERATION ERROR MESSAGESERRORNUMBERERROR MESSAGEEXPLANATION4002A degenerated tetrahedron was createdThe mesh generator ran into numerical difficulties while creating tetrahedrons with a size based on user-controlled parameters. Causes could be too small and narrow subdomains relative to the rest of the geometry or exceedingly short boundary segments. Try to avoid creating small and narrow subdomains and very short boundary segments that are adjacent to longer boundary segments.4003A degenerated triangle was createdThe mesh generator ran into numerical difficulties while creating triangles with a size based on user-controlled parameters. Causes could be too small and narrow subdomains relative to the rest of the geometry or exceedingly short boundary segments. Try to avoid creating small and narrow subdomains and very short boundary segments that are adjacent to longer boundary segments.4012Cannot create mapped mesh for this geometryThe geometry does not fulfill the topological requirements for a mapped mesh. Changes in input parameters or further subdomain division can possibly help this.4026Failed create matching edge discretizationsCannot make mapped mesh with the given input parameters.4029Failed to insert pointProblems inserting point at given coordinate. Manually inserting a point there may help.4031Failed to respect boundary element on geometry edgeThe mesh generator failed in making the elementscompatible with the geometry object's edges. Th for this could be that the face mesh is too coarse 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.4032Failed to respect boundary element on geometry faceSee Error message 4031.4044Internal error boundary respectingSee Error message 4031.4054Invalid topology of geometryThe geometry object cannot be used for creating a mapped mesh. It must be subdivided.4055Isolated entities foundEntities that are not connected to the boundaries of a geometry objects is found. The mapped mesh generator does not support such isolated entities.4119Singular edge detectedThe geometry object contains an edge of zero length.reason6000 -999 Assembly and Extended MeshERRORNUMBERERROR MESSAGEEXPLANATION6008Circular variable dependency detectedA variable has been defined in terms of itself, possibly in a circular chain of expression variables. Make sure that variable definitions are sound. Be cautious with equation variables in equations.6063Invalid degree of freedom nameThe software does not recognize the name of a degree of freedom. Check the names of dependent variables that you have entered for the model. See also Error 7192.6139Wrong number of DOFs in initial valueThe current solution or the stored solution has 。