Geometry Group Does Not Exist

- May 27, 2020 at 1:11 pm
  
  Sven
  Subscriber
  
  Hello,
  
  I'm have modeled a ship in Rhino en imported this in spaceclaim in ANSYS. I created two surfaces like the upper en lowerhull of the ship. This to define the waterline. When I open model it always got these errors and I don't know what they mean and can't find anything about these errors. Can someone help me please??
  
  Kind Regards!
- February 24, 2022 at 4:00 am
  
  JoshuaNenadich
  Subscriber
  
  Hello Sven I am currently working on a similar project for my university's AUV team and recieved the same errors. Would please let me know how you fixed the errors? Thanks.
  Regards.
- February 24, 2022 at 9:44 am
  
  Mike Pettit
  Ansys Employee
  
  Hi JoshuaNenadich,
  With Aqwa errors it is best to look at the errors in the order that they are reported, which means means starting from the bottom of the Output window and reading up.
  In this case "REGLID: NO DIFFRACTING ELEMENTS FOUND FOR STRUCTURE#1" indicates that there are no diffracting elements for your first structure, i.e. it is entirely out of the water, or it has been marked as Non-Diffracting in the Surface Body details. This is usually allowed in an Aqwa analysis, but the next error message "LIDMES: FAILED TO CREATE INTERIOR LID FOR STRUCTURE#1" suggests that you have turned on the Generate Internal Lid option for the structure. For an Internal Lid to be generated, the structure must have some diffracting elements and it must cut the water plane.
  We have also seen rare instances where geometry does not get translated correctly from SpaceClaim, and this could possibly cause the error you see above. However, this is fixed in Release 2022 R1. Please let me know if you are using an earlier release, and share a screenshot of the geometry if that's possible.
  Cheers, Mike