A call to error appears to use sprintf to construct the error message. Because you can call error in numerous ways (with or without error tags, with or without formats and extra arguments, and so on), sometimes Code Analyzer mistakenly produces this message when you use sprintf to produce an error tag or use it as an argument to an existing format specifier.

Remove the sprintf call and pass the format specifier and arguments directly to the error function. For example, replace code such as this:

error('prog:input', ...
sprintf('Cannot open %s because %s\n', ...
filename, reason));

with this code:

error('prog:input', ...
'Cannot open %s because %s\n', ...
filename, reason);

Note that MATLAB converts special characters (such as \n, \t, %s, and %d) in the error message only when you specify more than one input argument with error.

If Code Analyzer produced this message erroneously, you can suppress it, as described in Adjust Code Analyzer Message Indicators and Messages.