 used to load kernels 
   via meta-kernels. As a side effect of clearing the kernel pool,
   all watched variables are marked as updated. Note that clearing
   the kernel pool does not delete watchers.
 
   This capability, though implemented in Fortran, is particularly 
   relevant to SPICE implementations such as Icy, for which the 
   state of the KEEPER system persists after any Icy-based IDL 
   script is run. Successive runs of Icy-based scripts may perform 
   in unexpected ways when scripts access d