Syntax that can produce this error:

pkzipc -add -smartkey=smartcrypt-ugDk5fa0SLVpNFYyruW2mGxQP9XH6YVF-MA_4_K71bfH3GFAT8HfgeMci5Rebfl3uDufluQDwyut62dY8= sc.zip testfile.txt

Smartcrypt(TM) Version 15 for Windows Licensed Version

Portions copyright (C) 1989-2016 PKWARE, Inc.  All Rights Reserved.

Reg. U.S. Pat. and Tm. Off.  Patent No. 5,051,745  7,793,099  7,844,579

7,890,465  7,895,434;  Other patents pending

* Strongly encrypting files with a passphrase using AES (256-bit)

* Using UTF-8 file names and comments

* Using default compression method

* Using fastest available AES algorithm

Creating .ZIP: sc.zip

PKZIP: (E89) Policy requires the archive to be encrypted

Resolution(s)

  1. If specifying -smartkey="accounting"  check capitilization ( -smartkey="Accounting" )
  2. If you are specifying a key, use -smartkey=urn=<key>