Informix installation failure via ITNM installer.

The following error is displayed in the de_trace.log:

2013-01-10 16:16:28.201-05:00 1 DEProcessReq executeChange vml-ncim
IP unexpected error during change management operation ACUCLI0001E No
valid hosting environment was found for the target of the root IU.

Either:

1. not enough space in /tmp or /opt
or:
2. interference from previous installations of the Deployment Engine

If there is enough space in the filesystems please take the following actions:

1. Run "$NCHOME/bin/CleanSystem -a"

Removes from the system all products and components that have files or
data stored in $NCHOME and $TIPHOME, including core components, GUI components, Tivoli Netcool/OMNIbus, and Informix. (This is just a way to
remove everything).

2.Once done, search the system for files or directories containing the string acsi in their name:

find / -name *acsi*
If you find any such instances, remove the directory.


3. Instructions for the manual removal of DE:

Removing from Unix-based Systems:

These are the steps to be taken to remove DE from UNIX machines, including Linux, Solaris, AIX, and HP.

For Global (root) installations:
a) Remove the /var/ibm/common directory.
b) Remove the /usr/ibm/common directory.
c) Clean up the /tmp directory, by removing the acu_de.log file , if it is there. d) Remove the /tmp/<username> directory, where <username> is the ID
of the user that installed DE (e.g. "root").
e) Remove all DE references from the /etc/inittab system file. The
DE entries should be delimited by
"#Begin AC Solution Install block" and "#End AC Solution Install block".

Remove all of the text between those delimiters, and the delimiting text, as well.

f) Remove all DE references from the /etc/services system file.



Once that is done then rerun the installation.