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UDF warnings

- December 8, 2025 at 9:53 am
  
  ata7333
  Subscriber
  
  While running UDF - I am getting warnings that fopen, fscanf are deprecated and use fopen_s, f_scanf_s_l for safety, I am unable to find documentation for same.
  SOme of the warnings like - '_vsprintf_l' is deprecated: This function or variable may be unsafe. Consider using _vsprintf_s_l instead. the same is not used in the code anywhere, can anyone help me out to figure out how to sort this along with documentation link for above ?
  Thanks in advance
- December 8, 2025 at 2:25 pm
  
  B D
  Ansys Employee
  
  Hello,
  Details on the I/O functions can be found here: A.13.3. Standard I/O Functions A.13. C Library Functions
  Have you tried compiling using in-built clang compiler?
- December 9, 2025 at 3:18 am
  
  ata7333
  Subscriber
  
  Hi,
  Can you guide me on using/knowing the clang compiler ? That would be most helpful.
  - December 9, 2025 at 5:55 pm
    
    B D
    Ansys Employee
    
    You just need to check the option while compiling:

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