/undefinedfilename GPL Ghostscript 8.54 unrecoverable error

Recently I got this error:

$ pdf2ps how_to_chose.pdf

Error: /undefinedfilename in (how_to_chose.pdf)

Operand stack:

Execution stack:

   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push

Dictionary stack:

   --dict:1120/1686(ro)(G)--   --dict:0/20(G)--   --dict:70/200(L)--

Current allocation mode is local

Last OS error: 2

GPL Ghostscript 8.54: Unrecoverable error, exit code 1

This error comes if pdf2ps is unable to find the file.  Check whether you have given complete path or whether you are currently in the directory where the file is located.