Writing waveform to TDMS File

[Tom_wolf]

Hello, 

I'm trying to write acquired data to TDMS file.

Code as below works very well: Data from random source is written to TDMS file 

When I try to use Waveform as input for TDMS Write.vi - there is nor error and no result for TDMS file:

What is the reason if no adding data to TDMS file?

Thank You for tips

[Kyle97330 · Accepted solution]

In a waveform, "dt" is just the time between points.  You need to actually add some data to the waveform in the Y array: