I am having a problem with the Plugable USB to DB-9 RS-232 adapter. I have been using this for several months without issue and now they will not work with my application.
Windows 10, 32-bit
Application calls a script that uses the MODE command to copy a file to the com port
This has been working successfully for months and now I get an error:
Device COM3 is not currently available
Access is Denied
I have checked and there are no other programs accessing the COM port.
I can get it to work if I do the following:
Uninstall the device (from device manager), deleting drivers
Re-install with Profilic drivers
The command works successfully
However, after a reboot, the error will occur again
I have tried driver versions v11, v12 and now v16 with the same results.
I have about 25 of your devices and they have been working fine for months and now at least 20 of them have started exhibiting this behavior.
Please advise how to resolve.