I have a simple form on a site that allows users to save info to a text file. I've opened the form on my desktop and then went online and submittedto the form. I didn't get any errors or corrupted information. So my question is, if multiple ppl are attempting to submit to the form simultaneously, will the file be locked? I tried to do the same thing with a csv file and it did lock and was unable to write to it until I closed the file. I'm trying to avoid using a RDBMS, should i be worried that multiple users won't simultaneously submit to the file? and why do i get a traceback when i attempt to do it to a csv file and not a plain text file? Thank you for your replies