Errors Opening COM port with USB converter

I have an application that uses the Pololu USB-serial converter, using an application written for the PC in BASIC (PowerBASIC 7.0). Frequently, but not always, when I try to open the COM port, I get an error 75 (path file access error). Usually (but not always) if I just retry the OPEN, it works on the second try. I’m not sure what this particular error means in relation to a COM port - I have verified that the COM port being used is correct, and the fact that is usually succeeds when retried is rather odd, since I just execute the same code over again.

Any thoughts???



Could your problems be caused by failure to properly close the port when you’re done with it?

- Ben