How to combine two different waveforms in labview

[weny]

Hello there,

I need to add two different waveforms (one is generated, one is read from a binary file) then output it to a DAQ board. My VI doesn't have compile error, but it pops up an run error, says dt of two waveforms is different. Is anybody know where I can find the reference example?

Thanks a lot,

Wendy

[pawel]

Do you have the same sample rate in both?