Data File being overwritten

[SONDOT]

Text data collection file is being overwritten. Last test is only entry remaining. Intermittent problem that occurs with either V5.1 or 6i. All data from previous testing appears to be deleted. Have installed an error check to notify operator that data file not found to indicate an overwite condition, but no errors reported

[SergKr]

If you are using Write file vi, check "pos mode" and "pos offset" inputs and monitor their values according to online help guidelines meaning.

If another vi is being used to write to file,which one? How are you open and close file? Hope that you are not open/close it between subsequent test runs. If so - how? VI algorithm sample will be good to take a look at in this case.