@Tom-Elliott, I cowardly run

cp /var/www/fog/lib/fog/group.class.php /var/www/fog/lib/fog/group.class.php-bak

I empty the MySQL task table in PHPMyAdmin and then run the command you requested:

wget -O /var/www/fog/lib/fog/group.class.php https://raw.githubusercontent.com/FOGProject/fogproject/c9431f0da0659fd5f6730b2a7e0ec0d38ad1f179/packages/web/lib/fog/group.class.php

No more error on group WOL. Thanks again

@Tom-Elliott Thanks a million, it worked ! (I just empty task table before applying.)

Server

FOG Version: 1.4.2 / 1.43
OS: Debian 8.8

Client

OS: Windows 7 32/64 bits

Description

Hi everyone,
We have the same issue here on Debian 8.8 for group wake up.
Tasks stay in “1” state and hosts start a deployment task that fail then reboot.

Timezone and clock are ok. (/etc/php5/apache2/php.ini /etc/php5/cli/php.ini and gui: fog_tz_info)

Any help would be appreciated.