Silent installer not working for CA WA Agent 11.4 SP1

Document ID : KB000120009
Last Modified Date : 06/11/2018
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The silent install may not work with 11.4 or 11.4 SP1 with the properties copied from DVD ISO.
Silent install command:
setup.exe -f

CA WA Agent 11.4 
OS Windows
The silent installer uses the installer properties file.  If the properties file has unrecognizable characters then setup will not be able to read the file.
In Windows, open the file with Notepad or Notepad++.  Delete all the lines with comments that start #.
There may be a special hidden character at the start of file. 
Note: The special characters (see above) are not visible in Windows Notepad.  Delete the first line and type it again.  Do not copy and paste from another source, as it can re-introduce such characters.

In Linux/UNIX use vi to open the properties file and special characters can be seen.  Delete or remove them and save the file again.