Hi,

 

The devices (pump controllers) are named TT01, TT02, TT03, TT04, NT07 and NT10, respectively.

These were attached to COM1, COM2, COM3, COM4, COM7 and COM10 (only in the interests of matching the number scheme, above).

 

When I installed the software, the first five worked perfectly.

But the last one was unable to connect.

 

On a hunch, we re-mapped the last comport to COM8:, in the operating system.

Now all 6 work perfectly.

 

I wondered if there is a single-numeric-digit constraint, on the serial port number?

 

Thanks,

 

Peter.