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ValueError
Python 3.6.8: /usr/local/bin/python
Sun May 19 14:21:13 2024

A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.

 /virtual/hagane/public_html/disp2.cgi in <module>()
    115         dispmode = 0
    116         v = dnum.split("-")
=>  117         afrom = int(v[0]) + 1
    118         ato = int(v[1]) + 0
    119 #       ahead = "<a href=\"disp2.cgi?book=" + book + "\">Newest 32</a>"
afrom undefined, builtin int = <class 'int'>, v = ['', '1']

ValueError: invalid literal for int() with base 10: ''
      args = ("invalid literal for int() with base 10: ''",)
      with_traceback = <built-in method with_traceback of ValueError object>