Export waveforms to file

[rogerwang]

I must use Export waveforms to file

But jumps out this frame 999.jpg

someone tell me append to file hypothesis is ture can Solves my problem

But I when sends out a signal, after formula heavy run, discovered my array value actually does not have the value which reoperates puts in 2nd time takes, is where has by mistake I change to false, presses down replace 99.txt the picture, the array value has the computation and the change Because I following have the movement which supplements and corrects, therefore each period of time, the formula must again capture 99.txt with 566.txt which originally establishes to make the operation inspection value to have the revision, How should I revise