What problem with my serial port?

[ha noi]

What problem with my serial port? I got problem since yesterday ! Before my CVI worked well, communicated with hardware. But now i can not communicate with my hardware via com port! I got the error code : "1073807298 Could not perform operation because of I/O error. " I still can communicate wih my hardware if i use other software, it works! But when I use labview, it seem did not work, i only saw the  power, TX led working,  and RX not working! ( I didn't change anything in my VI, before it worked, but now it can not). Thanks!

[Ali84]

Hi there. I don't know whether you re-checked the values hadn't changed if you didn't change them? The thing is, all controls in the front panel have a default value. Maybe you tested your hardware while changing the values, saved and closed the application? If so, when restarting the program (the next day or whenever), the values will have reinitialized to their default value instead of retaining thos you gave them the day before. The only way to prevent this is to change their default value (right click on the control). For instance if you're using COM2 as port, the program might be trying to read from COM1 (default value).

Message Edited by Ali84 on 12-05-2007 04:08 PM