Appending tdms files problem

[Herbert Engels]

Yes, you can. The only reason I used cmd is that it handles large files without me writing additional code for that.

Herbert

[aartjan]

Wow, that's awesome! 

I wonder, though: do channels get appended? One better make sure no samples are discarded while switching over to a new file then.

[Herbert Engels]

Channels get appended. For properties that exist in more than one of the files you are merging, the last value in the merged file is going to trump all previous values.

Herbert

[aartjan]

So if you have waveforms in the files, you better read the first t0 and overwrite it in the file after merging. Makes the hack rather less useful.

[harsh08]

Herbert,

            I tried to append my 2 large TDMS files using copy /b command and i was successful to append them (total file size 4 GB) but when i open the file in Data view i can only see data from 1st file.Maybe the channels are not appended.Any suggestions on the issue?

[YongqingYe]

harsh08,

After append (or merge) the 2 TDMS files into 1 TDMS file, before using the file, you need to append (or merge) the 2 .tdms_index file together as well, or just delete the old .tdms_index file.

[harsh08]

I also appended the .TDMS_index files but it is giving me same results

[YongqingYe]

What about to delete the .tdms_index file? It would create a new .tdms_index file automatically.

[harsh08]

Deleting the new.tdms_index file is also giving the same results.

[YongqingYe]

OK, maybe the next thing you can try is to defragment the merged new file. If it still doesn't work, I'm wondering whether it's possible to post your old 2 files here or send it to me? I can do more investigation.

Thank you.