Apparently all the problem was caused by the serial to USB converter, I got another one and connected the logger through it, now everything is working properly again.

Thank you very much for your help

Best Regards

The Com Port number has not changed, but let me ask you this, if it did change shouldn't the software display the: "Logger not found on COM #" message? or it might show the error message i told you about before?

Thanks

I'm connecting the logger to my PC through a serial to USB converter, if you please can you list all the reasons that might cause this problem, I'm not a new user, i've been using pico products for a year now, so a list would be helpful for solving future problems.
Thanks

My Enviromon system was running perfectly, but today I started it and it is not displaying any information on any of the parameters and it shows an error warning with the message " logger is not running , re-programme logger to restart it " , is displayed .What could be the cause of the problem? doe...