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       glob EXPR
       glob    In list context, returns a (possibly empty) list of fil
+ename
               expansions on the value of EXPR such as the standard Un
+ix shell
...
               "<*.c>" operator, but you can use it directly. If EXPR 
+is omit-
               ted, $_ is used.  The "<*.c>" operator is discussed in 
+more
               detail in "I/O Operators" in perlop.

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    my ($filename)=glob("$path*$_*.pkl");
    if (defined($filename))
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