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- August 20, 2024 at 6:30 pm
  
  Farah
  Subscriber
  
  I'm running a two-way FSI analysis in ANSYS Fluent. My UDF worked fine when I tested it in pure CFD analysis, but when I use it in the FSI simulation, it doesn't run, and I get this error:
  Can you help me figure out what's causing this and how to fix it?
- August 20, 2024 at 6:56 pm
  
  Federico
  Ansys Employee
  
  Hello Farah,
  are you sure this is because of the UDF? Does your analysis run if you deactivate it?

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