I have an mtp400 unified basic panel and a dongle connected to the X62 USB port. In my case I have to write a header and a row of data to a csv file.

If after writing the data, I stop the runtime and eject the stick from the "connected devices" page, I don't lose any data but if i remove the USB stick when the panel is turned off or with the panel turned on, I lose the row or rows of data or the entire file.

I noticed that WriteFile and AppendFile takes a lot of time to end execution also if the script is ended.

If i wait 1-2 minutes I have no data loss.

Technical Support answered me like this:

" If you simply turn off the panel or pull out the USB-stick while the runtime is running, the file will not be closed properly and data loss may occur.

This is exactly the same as when you turn off a PC during operation or de-energize it without first shutting it down.

Therefore, it is important to close any previously scripted file before pulling it out, or to exit the runtime using the StopRuntime function before removing the stick. "

Someone knows how to solve this problem since technical support doesn't want to do it.

Thank you.