MAX error 7411 when downgrading cFP 2120

Question

Hello,
I am running LV 8.2 for an old Industrial project that I am doing some changes to. The project is running on a cFP 2120. That cFP is running 24*7 in production.
The actual cFP 2120 I am trying to test my software on, currently has LV RT 2009 installed.
But I now need to downgrade it to LV RT 8.2.
I first tried using the MAX version (4.0.x) installed in LV 8.2, but when trying to do"Add/Remove" software, I get Error7411 as shown in link below:
http://objective.no/gostemp/max_error_7411.jpg
I then tried to install MAX from my LV2009 distribution in the LV 8.2 environment. Installed fine, but when trying to run it, it complained that it was not properly installed.
I restored my PC, and tried to install MAX 4.4.1 from a LV 8.5.1 distribution. This version of MAX works fine, but I get the same Error 7411 when I try to click the "Add/remove"  software button.
So, the question is:
a) How do I clean the rt software (RT 2009) from the cFP2120 so that I can do a clean install of LV RT 8.2 onto it?
Please help, as all my searching has not given me any clue on how to do this !
Geir Ove

Answer 1

Hello Muks
Yes, I have seen that. Upgraded to Max that came with LV 2009, that rendered MAX useless: It complained about a "faulty installation".
Restored XP computer, and tried with MAX that came with LV 8.5.1. That version of MAX worked, but I get the same problem.
Funny that National haven't thougt of this. There should be a way of "cleaning" software off a cFP so that one could start with blank sheets and install any LVRT version onto it !
Any help from National Instrument staff?
Geir Ove