Application slows on continuous execution

[VEEDAY]

I have created a LABVIEW application that sends some command to a custom hardware and reads data back in waveform chart, then uses the waveform history to store the data in ASCII. On each execution, the waveform history is empty but one successive run, the labview application takes longer and longer to send the command and return the data.

Can I get some pointers how to fix this issue?

Thanks

Rajeev

[JÞB]

you are not using the run contiuously button are you?-  thats for debug ONLY!  place a while loop around the code that needs to repeat (not initiialization or cleanup- just the data acquisition itself) and put a Stop button on the FP wired to the while loop conditioal terminal.