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