#10 Problem with sending data to multiple COMports using hub4com

[Robbedoes]

I am trying to set up a configuration for testing changes to an existing program. I want to use my simulation program in both the original and the updated program. I used .\com0com\setupg.exe to create the necessary COM Ports: COM15 <-> CNCB0, COM11 <-> CNCB1, and COM13 <-> CNCB2. The original uses another simulation program on COM pair COM12 <-> COM16 (This one is functioning just fine).

To receive the messages from my simulation software on both (VB6) programs I installed a hub4com using the following statement:
hub4com.exe" \\.\CNCB0 \\.\CNCB1 \\.\CNCB2

This configuration functions fine with HyperTerminal.
Everything sent by my simulation software into COM15 is received simultaneously on both COM11 and COM13.
Now, when I disconnect both COM Ports and hook up my own VB6 programs, the data does not seem to become available on the MSCOMM object.
(I am polling MSCOMM on a Timer Events, checking MSCOMM.InBufferCount to see if there is any data available for processing)

When I stop debugging and restart HyperTerminal, the data is immediately available when I reconnect to COM11 and COM13.
Is there anything wrong with my configuration?
Do I need any hardware signals, or are they lost using hub4com?
I could do with some hints on hub4com...

(By the way, communication does function when I am using "real" COM Ports or USB to Serial convertors. The same goes for a COM Pair defined using com0com. Therefore I expect the problem has got something to do with hub4com)

[Robbedoes]

I noticed a typo in the configuration statement for hub4com.
I don't know how to fix it in my post, so I will just add a comment...

The actual statement I used is as follows:
hub4com.exe \\.\CNCB0 \\.\CNCB1 \\.\CNCB2

[Vyacheslav Frolov]

By default hub4com use CTS handshaking on output so if CTS state is OFF
then no any data can be sent to the port. To disable CTS handshaking add
--octs=off option.

For more info see

hub4com.exe --help=serial

[Robbedoes]

Thank you VFrolov!
That did the trick!
Happy Comm-ing!