Automated builds w/RH6 and RH7

Question

We use an automated build process (Visual Build Professional)
that checks the RH files out of the source control software (we use
Surround) and generates the Webhelp output using a Robohelp command
line in the build script. Up until now, we used RH6 and the process
was amazingly seamless. I'd check my source files into Surround at
the end of the day and the next morning, the output would appear in
the new build of our application.
Sweet.
The problem that I'm writing about happened when I upgraded
my files to RH7 right after our last software release. While I'm
having no problems generating output in RH7, the build engineer can
no longer get it to work in the automated process. (Yes, we
upgraded to RH7 on the build machine, updated the command line to
RH7, and no, we're not trying to run the build across a network.)
Since "my" step is causing the entire build to fail (oops),
I've been asked to help figure out what's going on...
Any thoughts to why RH6 would work in this scenario but not
RH7?
I should probably mention that we still need to support our
last release, which was done in RH6. That means that RH6 and RH7
are both installed on the build machine in case they need to
rebuild the last version of the help. Are there any known issues
with that? I haven't experienced any problems having em both on my
computer, as long as I don't inadvertently open the RH7 version
with RH6 and vice versa.

Answer 1

RoboHelp creates an entry in the PATH environment variable
and uses it for running from command line. If you have both RH6 and
RH7 installed then most likely you have 2 entries for RoboHelp in
the PATH variable. If you run RH7 command line and RH6's entry is
before RH7's in the PATH variable then it would create problems.
It can be fixed in the build script. Please make sure that
entry for RH7 is before RH6 in the PATH variable if you wnat to run
RH7 command line complier and vice versa if you want to run RH6
command line compiler.
e.g. (to set the path)
set PATH="c:\program files\Adobe\Adobe RoboHelp
7\RoboHTML";%PATH%
Vivek.