system coupling of FSI cannot run

- February 16, 2023 at 3:16 am
  
  posada won
  Subscriber
  
  I try to use fluent and transient structure to make FSI analysis. It can be setup in each system, but when I try to combine them to use the system coupling, it'll always give me the message as following. Hope to receive the solving method of problem.
  
  ===============================================================================
  Transcript output started: 2023-02-16 11:12:24
  
  ===============================================================================
  +=============================================================================+
  | |
  | Summary of Coupling Setup |
  | |
  +=============================================================================+
  ===============================================================================
  +=============================================================================+
  | Coupling Participants (2) |
  +=============================================================================+
  | |
  | Participant: 流体流动（Fluent） |
  | Type : FLUENT |
  | UpdateControls: |
  | Option : ProgramControlled |
  | Region: building |
  | Topology : Surface |
  | Input Variables : displacement |
  | Region: wall |
  | Topology : Surface |
  | Output Variables : force |
  | Variable: displacement |
  | Quantity Type : Incremental Displacement |
  | Location : Node |
  | Tensor Type : Vector |
  | Is Extensive : False |
  | Data Type : Real |
  | Variable: force |
  | Quantity Type : Force |
  | Location : Element |
  | Tensor Type : Vector |
  | Is Extensive : True |
  | Data Type : Real |
  | |
  +-----------------------------------------------------------------------------+
  | |
  | Participant: 瞬态结构 |
  | Type : MAPDL |
  | UpdateControls: |
  | Option : ProgramControlled |
  | Region: 流体固体界面 |
  | Topology : Surface |
  | Input Variables : 力, Force_Density |
  | Output Variables : 增量位移 |
  | Variable: 力 |
  | Quantity Type : Force |
  | Location : Node |
  | Tensor Type : Vector |
  | Is Extensive : True |
  | Data Type : Real |
  | Variable: 增量位移 |
  | Quantity Type : Incremental Displacement |
  | Location : Node |
  | Tensor Type : Vector |
  | Is Extensive : False |
  | Data Type : Real |
  | |
  +=============================================================================+
  | Analysis Control |
  +=============================================================================+
  | |
  | Analysis Type : Transient |
  | Global Stabilization : None |
  | OptimizeIfOneWay : False |
  | AllowSimultaneousUpdate : False |
  | PartitioningAlgorithm : SharedAllocateMachines |
  | |
  +=============================================================================+
  | Coupling Interfaces (2) |
  +=============================================================================+
  | |
  | Interface: interface-1 |
  | Side: One |
  | Coupling Participant : 流体流动（Fluent） |
  | Region List : wall |
  | Reference Frame : GlobalReferenceFrame |
  | Side: Two |
  | Coupling Participant : 瞬态结构 |
  | Region List : 流体固体界面 |
  | Reference Frame : GlobalReferenceFrame |
  | Data Transfer: 数据传输 |
  | Suppress : False |
  | Target Side : Two |
  | Source Variable : force |
  | Target Variable : 力 |
  | Mapping Type : Surface Conservative |
  | Convergence Target : 1.00E-02 |
  | Ramping Option : None |
  | Relaxation Factor : 1.00E+00 |
  | Mapping Control: |
  | Absolute Gap Tolerance : 0.0 [m] |
  | Face Alignment : ProgramControlled |
  | Poor Intersection Threshold : 5.00e-01 |
  | Relative Gap Tolerance : 1.00e+00 |
  | Stop If Poor Intersection : True |
  | |
  +-----------------------------------------------------------------------------+
  | |
  | Interface: interface-2 |
  | Side: One |
  | Coupling Participant : 瞬态结构 |
  | Region List : 流体固体界面 |
  | Reference Frame : GlobalReferenceFrame |
  | Side: Two |
  | Coupling Participant : 流体流动（Fluent） |
  | Region List : building |
  | Reference Frame : GlobalReferenceFrame |
  | Data Transfer: 数据传输 2 |
  | Suppress : False |
  | Target Side : Two |
  | Source Variable : 增量位移 |
  | Target Variable : displacement |
  | Unmapped Value Option : Nearest Value |
  | Mapping Type : Surface Profile Preserving |
  | Convergence Target : 1.00E-02 |
  | Ramping Option : None |
  | Relaxation Factor : 1.00E+00 |
  | Mapping Control: |
  | Absolute Gap Tolerance : 0.0 [m] |
  | Face Alignment : ProgramControlled |
  | Poor Intersection Threshold : 5.00e-01 |
  | Relative Gap Tolerance : 1.00e+00 |
  | Stop If Poor Intersection : True |
  | |
  +=============================================================================+
  | Solution Control |
  +=============================================================================+
  | |
  | Duration Option : EndTime |
  | End Time : 2.0 [s] |
  | Maximum Iterations : 5 |
  | Minimum Iterations : 1 |
  | Time Step Size : 0.2 [s] |
  | |
  +=============================================================================+
  | Output Control |
  +=============================================================================+
  | |
  | Output Control Option : LastStep |
  | Results |
  | IncludeInstances : ProgramControlled |
  | Option : ProgramControlled |
  | Type |
  | Option : EnsightGold |
  | Write Initial Snapshot : True |
  | |
  +=============================================================================+
  +-----------------------------------------------------------------------------+
  | Warnings were found during data model validation. |
  +-----------------------------------------------------------------------------+
  | Warning: Participant 瞬态结构 (CouplingParticipant:Solution) has the |
  | ExecutionControl 'Option' set to 'ExternallyManaged'. System Coupling |
  | will not control the startup/shutdown behavior of this participant. |
  | Warning: Participant 流体流动（Fluent） (CouplingParticipant:Solution 2) has the |
  | ExecutionControl 'Option' set to 'ExternallyManaged'. System Coupling |
  | will not control the startup/shutdown behavior of this participant. |
  +-----------------------------------------------------------------------------+
  
  +-----------------------------------------------------------------------------+
  | 'cp950' codec can't encode character '\u6001' in position 1: illegal |
  | multibyte sequence |
  +-----------------------------------------------------------------------------+
  Transcript output stopped: 2023-02-16 11:12:24
  ===============================================================================
  ----------------------------+
  Transcript output stopped: 2023-02-16 11:12:24
  ===============================================================================
- February 22, 2023 at 4:49 pm
  
  Federico
  Ansys Employee
  
  Hello Posada,
  This error message is related to a Unicode encoding issue. This error is usually caused by attempting to use characters that are not supported by the chosen encoding. The 'cp950' codec is a traditional Chinese encoding that supports the Big5 character set, and it's possible that the character '\u6001' is not part of that character set.