Many problems arising in science and engineering are modeled by
nonlocal initial-boundary value problems (IBVPs) in one space 
variable. In such a problem, the governing partial differential 
equation and/or boundary conditions involve spatial integrals of 
the solution. Although high-quality software exists for solving 
standard IBVPs, it cannot handle such nonlocal problems directly. 
In this report, a reformulation technique, previously applied to 
nonlocal two-point boundary value problems, is extended to nonlocal 
IBVPs to enable their solution to a user-prescribed accuracy using 
a state-of-the-art error control software package. The efficacy of 
this approach is demonstrated using several nonlocal problems from 
the literature.