calc: Autoloading Problems
4.11.1 Autoloading Problems
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The Calc program is split into many component files; components are
loaded automatically as you use various commands that require them.
Occasionally Calc may lose track of when a certain component is
necessary; typically this means you will type a command and it won’t
work because some function you’ve never heard of was undefined.
If this happens, the easiest workaround is to type ‘C-x * L’
(‘calc-load-everything’) to force all the parts of Calc to be loaded
right away. This will cause Emacs to take up a lot more memory than it
would otherwise, but it’s guaranteed to fix the problem.