The read mode limits you to opening the file and reading what’s inside without being able to change or add to it. Write mode creates a file. Reading the file once it’s opened is done using the read() ...

The problem I've noticed is that if I append the file with each of the 100k runs (one at a time), it can happen that two threads try to save to the file at the same time and some row(s) end up empty.

That function ... file never grows, even though it should be filling with zeroes....<BR><BR>Does anyone know a way around this?<BR><BR>P.S. I [think I] need to interact on the os.open()/os.write ...