dd-rhelp uses older-style tail and head where +NUMBER was a valid command line option. Current tail and head don't like it and complain that if can't find the file "+NUMBER".
Created attachment 105067 [details, diff] tail_n_head.patch Patch for dd-rhelp 0.0.6 to modernize use of head and tail. Changes command line options: -NUMBER to -n NUMBER +NUMBER to -n +NUMBER
(patch was also submitted upstream)
The package was removed from the tree.