When I save my data to a spreadsheet txt file I lose some data why is this?

[Joey Wood]

I lose about 3 hours worth of data everyday but it is at different times of the day. I am saving my data to a spreadsheet txt file in excell about every 15 minutes. Why is my data disappearing?

[vt92]

There could be several different reasons. Maybe some data is being lost when the file is updated. Give us some more specific information and/or part of your code and we can give you a better answer.

[Joey Wood]

Here is my code hope you can find an answer.

[Jeremy Braden]

Joey, you have alot in your block diagram.

Are you losing time on your computer or is it data? Is the data missing in one piece or is it missing data in several pieces?

I have the following suggestions. Your code would benefit with subVIs. Also, instead of discarding readings that happen before your time specification, you can use a wait until next ms so that your program will sit idle until it is time to take a reading. You can also set indexes on you array functions and supply a format string on the format into file function to ensure that the proper values are outputed. If problems still exist, strip down your code to one data channel to simplify your file i/o. Run the stripped down code to see if it looses data.

Jeremy

[vt92]

Good suggestions. How fast is your data changing? Are you discarding data that you may need? It looks like you are pushing a lot of data into the file, you may want run the acquire data function and the save data functions in separate loops and use notifiers or, use object-oriented programming to get rid of some of the dependancy.