Strange problem with LabVIEW during write TDMS files

[Lesterino]

Hello,
I have to save about 20 TDMS signals, I built a VI with constant signals for example. The WRITE DATA settings are in jpg attached.

The problem is this: after the saving process and TDMS CLOSE, the program is still in running condition, the CPU work increase, and the vi become white for some time (about 1-2 minutes). If I increase the points (in this case 1300 iterations) the time increase consequently.

My pc is Intel Pentium 4, 3.2 GHz CPU, 2 GHz RAM. But the problem is the same also with other pc.

The question is the amount of data?

It’s a strange problem because the TDMS are been created and the storage seems closed!

[YongqingYe]

If you care about the performance of your application like CPU usage, I would like to suggest you use TDMS nodes directly instead of Storage VIs Express VIs. TDMS nodes are in Programming -> File I/O -> TDMS on your menu palette.

[Mavis]

Hi Lesterino,

After the write-close TDMS process, LV will need to free all the refnums that are allocated during the process, where the close function of each refnum will be executed. It will take more time with more iterations.

Mavis

[Lesterino]

I understand but the problem is I need to save more points: I wait 15-20 minutes before Labview returns to work, and the pc during this time is freeze!

[Lesterino]

ok, for the moment I solve reducing the points number.

Thank you