TDMS error -2503. Is seemingly corrupted file able to be recovered?

We performed a rather expensive test with multiple instruments and gauges on a specimen and recorded the data to a TDMS file. Before we performed the test, we recorded to a "dummy" tdms file for a few minutes and then reviewed the file to confirm that we were recording all the gauges properly. Everything was fine and we knew we were ready to test.
We then recorded during the test and the TDMS file ended up being about 400 Mb. After recording we attempted to open the file and recieved the following error:
"Error -2503
Possible reason(s):
LabVIEW: Specified file does not comply with TDMS file format standards."
There is no record of this error on the forums or anywhere on the website. The data is there, the file is huge. We just need to figure out how to recover it. This data is very important to us. Is there any way to analyze the tdms file and recover the data?
Any time we attempt to open the file in any way we receive the same error. We have tried opening it with the TDMS Excel Importer, Open TDMS file.vi, TDMS Defragment. No luck. The error seems to be occurring in the open tdms file.vi.
The file is very large or I would post it here. Please help
[will work for kudos]
Solved!
Go to Solution.

I solved the problem.
I was trying to figure out which part of the tdms file was corrupt. I was preparing for a long day of altering bits/bytes to fix the corruption, which I have done in the past and is never fun, but it wasn't necessary. Using a file analyzer (http://www.safer-networking.org/en/filealyzer/index.html) I could see that the data was there and the headers were correct throughout the data in the tdms file. There didn't appear to be any wierdness in the beginning or end of the file. This told me that the problem was probably in the index file. I had been reviewing the new advanced tdms VIs in LabView 2010 and was looking for something that could help me. The Advanced TDMS Open.vi mentioned that it deleted the index file and opened the tdms file. I thought perhaps it would recreate the index file. It didn't. The tdms index file was automatically recreated when I opened the the TDMS file and it recreated it properly. The data is there. The file opens properly this time. All is well. It definately leaves me wondering what created the corruption in the first place and how to prevent it in the future.
Solution:
Delete the tdms index file. The TDMS Excel Importer will recreate the index file properly when you open the file. The file opened with no errors for me.
[will work for kudos]

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