Intermittent error on call_user_func() during backup

I get this error on an intermittent basis. The backups do finish, however the resulting backup file is generally much larger than a backup when the error doesn’t happen.

Any idea how to fix this?

Thanks!

Message at bottom of email I received
[12-Apr-2013 03:08:57 America/Chicago] PHP Fatal error: Call to undefined method stdClass::update_working_data() in /mnt/stor1-wc1-dfw1/380423/487470/www.polizeros.com/web/content/wp-content/plugins/backwpup/inc/class-destination-s3.php on line 449 [12-Apr-2013 01:08:57] ERROR: Call to undefined method stdClass::update_working_data() [12-Apr-2013 01:08:57]

LOG

[INFO] BackWPup version 3.0.6; WordPress version 3.5.1; A project of Inpsyde GmbH developed by Daniel Hüsken
[INFO] This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions.
[INFO] BackWPup job: polizeros-database; DBDUMP
[INFO] BackWPup cron: 0 1 * * *; Fri, 12 Apr 2013 @ 01:00
[INFO] BackWPup job started from wp-cron
[INFO] PHP ver.: 5.3.20; apache2handler; Linux
[INFO] Maximum script execution time is 120 seconds
[INFO] MySQL ver.: 5.0.77-log
[INFO] curl ver.: 7.15.5;  OpenSSL/0.9.8b
[INFO] Temp folder is: /mnt/stor1-wc1-dfw1/380423/487470/www.polizeros.com/web/content/wp-content/uploads/backwpup-d6cf7-temp/
[INFO] Logfile folder is: /mnt/stor1-wc1-dfw1/380423/487470/www.polizeros.com/web/content/wp-content/uploads/backwpup-68227-logs/
[INFO] Backup type is: archive
[INFO] Backup file is: /mnt/stor1-wc1-dfw1/380423/487470/www.polizeros.com/web/content/wp-content/uploads/backwpup-d6cf7-temp/polizeros-database_8c8d96_2013-04-12_01-00.tar.gz
[12-Apr-2013 01:08:08] 1. Try to dump database …
[12-Apr-2013 01:08:08] Connected to database 487470_polizeros_wordpress on mysql50-71.wc1.dfw1.stabletransit.com
[12-Apr-2013 01:08:08] Dump database table "falbum_cache"
[12-Apr-2013 01:08:08] Dump database table "sk2_blacklist"
[12-Apr-2013 01:08:09] Dump database table "wp_commentmeta"
[12-Apr-2013 01:08:09] Dump database table "wp_comments"
[12-Apr-2013 01:08:10] WARNING: call_user_func() expects parameter 1 to be a valid callback, function '' not found or invalid function name
[12-Apr-2013 01:08:10] WARNING: call_user_func() expects parameter 1 to be a valid callback, function '' not found or invalid function name
[12-Apr-2013 01:08:10] WARNING: call_user_func() expects parameter 1 to be a valid callback, function '' not found or invalid function name
[12-Apr-2013 01:08:10] WARNING: call_user_func() expects parameter 1 to be a valid callback, function '' not found or invalid function name
[12-Apr-2013 01:08:10] 1. Try to dump database …
[12-Apr-2013 01:08:10] WARNING: call_user_func() expects parameter 1 to be a valid callback, function '' not found or invalid function name
[12-Apr-2013 01:08:10] Connected to database 487470_polizeros_wordpress on mysql50-71.wc1.dfw1.stabletransit.com
[12-Apr-2013 01:08:10] Dump database table "falbum_cache"
[12-Apr-2013 01:08:10] Dump database table "sk2_blacklist"
[12-Apr-2013 01:08:10] Connected to database 487470_polizeros_wordpress on mysql50-71.wc1.dfw1.stabletransit.com
[12-Apr-2013 01:08:10] Dump database table "falbum_cache"
[12-Apr-2013 01:08:10] Dump database table "sk2_blacklist"
[12-Apr-2013 01:08:10] Dump database table "wp_commentmeta"
[12-Apr-2013 01:08:10] Dump database table "wp_commentmeta"
[12-Apr-2013 01:08:11] Dump database table "wp_comments"
[12-Apr-2013 01:08:11] Dump database table "wp_comments"
[12-Apr-2013 01:08:12] Dump database table "wp_links"
[12-Apr-2013 01:08:12] Dump database table "wp_options"
[12-Apr-2013 01:08:12] Dump database table "wp_options1"
[12-Apr-2013 01:08:12] Dump database table "wp_postmeta"
[12-Apr-2013 01:08:12] Dump database table "wp_links"
[12-Apr-2013 01:08:12] Dump database table "wp_options"
[12-Apr-2013 01:08:12] Dump database table "wp_options1"
[12-Apr-2013 01:08:12] Dump database table "wp_postmeta"
[12-Apr-2013 01:08:13] Dump database table "wp_links"
[12-Apr-2013 01:08:13] Dump database table "wp_options"
[12-Apr-2013 01:08:13] Dump database table "wp_options1"
[12-Apr-2013 01:08:13] Dump database table "wp_postmeta"
[12-Apr-2013 01:08:15] Dump database table "wp_posts"
[12-Apr-2013 01:08:15] Dump database table "wp_posts"
[12-Apr-2013 01:08:17] Dump database table "wp_posts"
[12-Apr-2013 01:08:20] Dump database table "wp_seo_title_tag_category"
[12-Apr-2013 01:08:20] Dump database table "wp_seo_title_tag_tag"
[12-Apr-2013 01:08:20] Dump database table "wp_seo_title_tag_url"
[12-Apr-2013 01:08:20] Dump database table "wp_sk2_logs"
[12-Apr-2013 01:08:20] Dump database table "wp_sk2_spams"
[12-Apr-2013 01:08:21] Dump database table "wp_term_relationships"
[12-Apr-2013 01:08:22] Dump database table "wp_term_taxonomy"
[12-Apr-2013 01:08:22] Dump database table "wp_terms"
[12-Apr-2013 01:08:22] Dump database table "wp_tla_data"
[12-Apr-2013 01:08:22] Dump database table "wp_seo_title_tag_category"
[12-Apr-2013 01:08:22] Dump database table "wp_tla_rss_map"
[12-Apr-2013 01:08:22] Dump database table "wp_usermeta"
[12-Apr-2013 01:08:22] Dump database table "wp_users"
[12-Apr-2013 01:08:22] Dump database table "wp_seo_title_tag_tag"
[12-Apr-2013 01:08:22] Dump database table "wpau_active_plugins_info"
[12-Apr-2013 01:08:22] Dump database table "wpau_upgrade_log"
[12-Apr-2013 01:08:22] Dump database table "wp_seo_title_tag_url"
[12-Apr-2013 01:08:22] Dump database table "wp_sk2_logs"
[12-Apr-2013 01:08:22] Dump database table "wp_sk2_spams"
[12-Apr-2013 01:08:23] Dump database table "wp_term_relationships"
[12-Apr-2013 01:08:24] Added database dump "487470_polizeros_wordpress.sql" with 62.27 MB to backup file list
[12-Apr-2013 01:08:24] Database dump done!
[12-Apr-2013 01:08:24] 1. Trying to create backup archive …
[12-Apr-2013 01:08:24] Compression method is TarGz
[12-Apr-2013 01:08:24] Dump database table "wp_term_taxonomy"
[12-Apr-2013 01:08:24] Dump database table "wp_terms"
[12-Apr-2013 01:08:24] Dump database table "wp_tla_data"
[12-Apr-2013 01:08:24] Dump database table "wp_tla_rss_map"
[12-Apr-2013 01:08:24] Dump database table "wp_usermeta"
[12-Apr-2013 01:08:24] Dump database table "wp_users"
[12-Apr-2013 01:08:24] Dump database table "wpau_active_plugins_info"
[12-Apr-2013 01:08:24] Dump database table "wpau_upgrade_log"
[12-Apr-2013 01:08:26] Added database dump "487470_polizeros_wordpress.sql" with 62.27 MB to backup file list
[12-Apr-2013 01:08:26] Database dump done!
[12-Apr-2013 01:08:26] 1. Trying to create backup archive …
[12-Apr-2013 01:08:26] Compression method is TarGz
[12-Apr-2013 01:08:26] Dump database table "wp_seo_title_tag_category"
[12-Apr-2013 01:08:26] Dump database table "wp_seo_title_tag_tag"
[12-Apr-2013 01:08:26] Dump database table "wp_seo_title_tag_url"
[12-Apr-2013 01:08:26] Dump database table "wp_sk2_logs"
[12-Apr-2013 01:08:27] Dump database table "wp_sk2_spams"
[12-Apr-2013 01:08:27] Dump database table "wp_term_relationships"
[12-Apr-2013 01:08:29] Dump database table "wp_term_taxonomy"
[12-Apr-2013 01:08:29] Dump database table "wp_terms"
[12-Apr-2013 01:08:29] Dump database table "wp_tla_data"
[12-Apr-2013 01:08:29] Dump database table "wp_tla_rss_map"
[12-Apr-2013 01:08:29] Dump database table "wp_usermeta"
[12-Apr-2013 01:08:29] Dump database table "wp_users"
[12-Apr-2013 01:08:29] Dump database table "wpau_active_plugins_info"
[12-Apr-2013 01:08:29] Dump database table "wpau_upgrade_log"
[12-Apr-2013 01:08:31] Added database dump "487470_polizeros_wordpress.sql" with 62.27 MB to backup file list
[12-Apr-2013 01:08:31] Database dump done!
[12-Apr-2013 01:08:31] 1. Trying to create backup archive …
[12-Apr-2013 01:08:31] Compression method is TarGz
[12-Apr-2013 01:08:31] Backup archive created.
[12-Apr-2013 01:08:31] Archive size is 16.88 MB.
[12-Apr-2013 01:08:31] 2 Files with 62.27 MB in Archive.
[12-Apr-2013 01:08:31] 1. Trying to send backup file to S3 Service …
[12-Apr-2013 01:08:33] Backup archive created.
[12-Apr-2013 01:08:33] Archive size is 16.88 MB.
[12-Apr-2013 01:08:33] 2 Files with 62.27 MB in Archive.
[12-Apr-2013 01:08:34] 1. Trying to send backup file to S3 Service …
[12-Apr-2013 01:08:39] Connected to S3 Bucket "polizeros" in
[12-Apr-2013 01:08:39] Starting upload to S3 Service …
[12-Apr-2013 01:08:39] Connected to S3 Bucket "polizeros" in
[12-Apr-2013 01:08:39] Starting upload to S3 Service …
[12-Apr-2013 01:08:39] Backup archive created.
[12-Apr-2013 01:08:39] Archive size is 27.09 MB.
[12-Apr-2013 01:08:39] 2 Files with 62.27 MB in Archive.
[12-Apr-2013 01:08:39] 1. Trying to send backup file to S3 Service …
[12-Apr-2013 01:08:43] Connected to S3 Bucket "polizeros" in
[12-Apr-2013 01:08:43] Starting upload to S3 Service …
[12-Apr-2013 01:08:55] Backup transferred to https://s3.amazonaws.com/polizeros/backwpup/polizeros-database_8c8d96_2013-04-12_01-00.tar.gz.
[12-Apr-2013 01:08:56] Job done in 502 seconds.

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