hi Gibbi
What version of labview are you using?
In the case you are using labview 8.20 here is a link where you can learn how to change the format of your tdm to tdms
In case you are not using LV 8.2 I need a little more information about your code in order to help you.
How many channels are you reading?
try to program TDM 's readings by channel groups not just channels
this arquitecture sometimes releases some resources of your computer
Also you can program a more efficient reading method to avoid the lattency.
If you need something else please post more info about your system.
Thanks for using National Instruments products
Erwin Franz
Certified LabVIEW Architect, Certified TestStand Developer