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There is a newer version: 1.12.1

 Why is this an issue?

  Passing the wrong number of arguments to a call to System.SysUtils.Format
  raises a runtime exception.


  Typically, the number of arguments should exactly match the number of format specifiers
  in the string. For some complex cases, a different number of arguments is required


  
    Width and precision wildcards in floating point format specifiers
    (e.g. %*.*f) require corresponding arguments
  
  
    Format specifiers with a specified index (e.g. %1:s)
    can reuse existing arguments or require additional arguments
  

How to fix it

  Ensure that the arguments to the Format call match the specifiers in the format
  string:

Format('%s (class %d) got %.*f percent on the test.', ['Bob', 74.599]);

Format('%s (class %d) got %.*f percent on the test.', ['Bob', 6, 2, 74.599]);

Resources

  
    
      RAD Studio API documentation: System.SysUtils.Format