Rename Group in TDMS File

Does anyone know how to rename a group in a TDMS file?
I have a TDMS file with 90 groups, each containing 4 channels. I would like to rename the groups within the file while leaving everything else the same. Thoughts?
thank you,
Scott Otterbacher

Thanks for the great input. However, I'm still having some problems. I have a for loop that runs through all the group names and at each iteration takes in the original and revised group names as inputs into TDMS Set Properties. Some of the groups go to the correct new names, but some get changed to incorrect ones. Attached is a copy of the VI. I'd include one of the TDMS files as well, but each are about 20Mb.
The TDMS file contains about 90 groups that are decimal strings which relate to antenna azimuth direction. When I collected the data I did not reference the azimuth to north, but rather I just pointed the antenna north and noted what position I was getting from the encoder (i.e. North = 156 deg). Now I want to go through and change the group names to be referenced to north = 0 deg. So I read in the array of group strings, convert to integer, subtract 156 or add 204, depending on the value, and then convert that new number back to a string and send it to the TDMS Set Properties function.
I am unsure if my problem is how i'm passing the arrays into the for loop or if it's how i'm using TDMS Set Properties.
Here is an example of what happens:
original groups: 5,8,13,17,20,25,28,32,36,etc...
desired groups: 209,213,217,221,224,229,232,236,240,etc...
new groups: 53,57,61,65,224,73,232,236,240,etc...
The first few are wrong, but then the 5th is correct along with the 7th, 8th, and 9th. 5 of the groups after that are also correct before it goes back to an erroneous one. The wrong group names seem to be from the array of correct names, but just from the wrong index of the array. This seems odd because the for loop should be reading in just one array value at a time, and in the correct order from beginning to end.
Hope you can help out a confused labview newbie.
Attachments:
Change_Az_TDMS.vi ‏25 KB

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Hi rvillalta319,
Sounds like you'll need to adapt your code to use both a for loop and some implementation of the GroupCount variable (or ChannelGroups.Count) as seen here:
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Attachments:
No Properties in Diadem 2011.docx ‏186 KB
BenenWalter.zip ‏190 KB

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Write to File Settings.PNG ‏40 KB
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You should not be using the comment. I just removed that and it all worked for me.
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Attachments:
GetAndSetPropertiesInTdmFile.vi ‏115 KB

Rename Group in TDMS File

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