Duplicator Error

I’ve been using your excellent plugin for over a year but the latest version is giving me problems on different sites and the same development server i’ve always used.

below is a snippet of the error – help would be much appreciated

VERSION: 0.5.2
WORDPRESS: 3.8.1
PHP INFO: 5.3.28 | SAPI: cgi-fcgi
SERVER: Apache
PHP TIME LIMIT: (0) no time limit imposed
PHP MAX MEMORY: Unabled to set php memory_limit

********************************************************************************
DATABASE:
********************************************************************************
BUILD MODE: PHP
MYSQLDUMP: Is Supported
MYSQLTIMEOUT: 5000
TABLES: total:16 | filtered:0 | create:16
FILTERED: []
7tk_commentmeta (0)
7tk_comments (1)
7tk_duplicator_packages (1)
7tk_iphorm_form_entries (0)
7tk_iphorm_form_entry_data (0)
7tk_iphorm_forms (2)
7tk_layerslider (32)
7tk_links (0)
7tk_options (217)
7tk_postmeta (4917)
7tk_posts (143)
7tk_term_relationships (197)
7tk_term_taxonomy (63)
7tk_terms (53)
7tk_usermeta (26)
7tk_users (1)
SQL CREATED: 20140221_example_database.sql
SQL FILE SIZE: 2.15MB
SQL RUNTIME: 2.28 sec.

!!!DUPLICATOR ERROR!!!
Please Try Again! If the error persists please see the Duplicator ‘Support’ link.
———————————————————————————
MESSAGE:
A required file contains zero bytes.
DETAILS:
Archive Size: 0B | SQL Size: 2.15MB | Installer Size: 408.57KB
———————————————————————————
TRACE:
1. package.php : Error (138)
2. task.php : Build (18)
3. actions.php : Create (12)
4. : duplicator_package_create ()
5. plugin.php : call_user_func_array (429)
6. admin-ajax.php : do_action (82)
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https://wordpress.org/plugins/duplicator/