Hi all,
today while installing Citrix Workspace, the post-install script gave me this error:

useradd: Can't get unique UID (no more available UIDs)
useradd: can't create user

So I examined the script, and saw that the command producing the error is this one:

useradd -d /var/log/citrix citrixlog

Trying to execute it at the cli gives the same error.

This are the contents of /etc/login.defs

FAIL_DELAY      "2"
GID_MAX "0"
GID_MIN "0"
PASS_MAX_DAYS   "0"
PASS_MIN_DAYS   "0"
PASS_WARN_AGE   "0"
UID_MAX "0"
UID_MIN "0"


Google does not help.
What could be the problem?

Thank you in advance
Cris