OpWriteFile & OpTrigger behavior

I have a question on the OpWriteFile block when used in the triggered mode without using the ID number input.

If the block is triggered after the file size limit is reached, is the .mat file overwritten or does it just retain the data that was collected during the initial trigger(s) until the limit was reached?

Answer

As soon as the file is full (file size limit is reached), it is closed. You should see a message in the load log:

Write to file, group XX: specified limit (XXXXXX) reached. Closing file.

Close file done (and the path of the file on the target).

When you try to trig the acquisition afterward, it does not overwrite the file.