calc: Autoloading Problems

 
 4.11.1 Autoloading Problems
 ---------------------------
 
 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.