last_file_subprob: Get last file subproblem
Description
Get last file subproblem
Usage
last_file_subprob(xpdb, ext, .problem)
Arguments
xpdb
An xpose database object.
ext
The file extension to be used.
.problem
The $problem number to be used.
Value
The number of the last file subproblem as an integer
for the given `.problem` and file `ext`.