Thank you Phil for your response.
>From what I get you are saying:
        --There is a file X on a system
        --User modifies it at some point in time
        --Installer checks that this file has been modified since being 
installed and does not overwrite it?

--Pavan

-----Original Message-----
From: Phil Wilson [mailto:phildgwil...@gmail.com]
Sent: Tuesday, May 05, 2015 11:59 AM
To: General discussion about the WiX toolset.
Subject: Re: [WiX-users] File not getting overwritten

You might be misunderstanding "check for modified dates". The absolute values 
are irrelevant. There is no "later version" based on later dates. An 
unversioned file will not be overwritten if its modified date is different to 
its creation date, no matter what the values are.
Windows Installer will set modified and creation dates the same at install time 
so it can see that the file has been altered.

---------------
Phil Wilson


On Tue, May 5, 2015 at 10:54 AM, Pavan Konduru <pavan.kond...@accelrys.com> 
wrote:
> Hi All,
>
> We have an installer that basically is trying to overwrite some files that is 
> on the host system. The files that are being overwritten were not installed 
> by the installer.
> When I run my installer, all these files get overwritten. On one particular 
> machine, these files don't seem to be overwritten no matter what. Here is a 
> log entry for one of the files.
>
> File: C:\Program Files\xxx \lib\xxx.jar;   Won't Overwrite;             Won't 
> patch;      Existing file is unversioned but modified
>
> All the other machines where I have run the installer this is the log, where 
> it gets overwritten:
>
> File: C:\Program Files \xx \lib\xxx.jar;     Overwrite;           Won't 
> patch;      Existing file is unversioned and unmodified - hash doesn't match 
> source file
>
> As per the MSI policy for overwriting files if they don't have versions is to 
> check for the modified dates. The file on system has a 2014 date and the file 
> from the installer has a 2015 date. The hashes don't match as the file 
> content has changed. So, why is the file not being replaced?
>
> --Pavan
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