Symptoms
On BA Home> System> Information> Hotfixes screen an error is shown:
"The operation has failed with the error code:256."
or
The problem occurred during the operation. Please contact Support or System Administrator.
Cause
To retrieve the list of hotfixes BA uses the following command:
sudo -n /usr/local/bm/tools/pba-hotfixes.pl -q -l list --quiet
In BA 5.5 processes run under user "pba" and BA does create appropriate configuration file to allow user pba to run this command via sudo:
[root@pba ~]# cat /etc/sudoers.d/pba-hotfixes
Defaults !requiretty
Cmnd_Alias PBAHOTFIXES = /usr/local/bm/tools/pba-hotfixes.pl
pba ALL=(ALL) NOPASSWD: PBAHOTFIXES`
However /etc/sudoers file can be customized, so that it does not check /etc/sudoers.d directory
Resolution
Make sure there is the following directive in /etc/sudoers file
## Read drop-in files from /etc/sudoers.d (the # here does not mean a comment)
#includedir /etc/sudoers.d