KISS Error on VMAIL notification

Hi. When my modem connects to a station for which there is VMAIL waiting, I get an error in the log. I have previously been able to send VMAILs to an AWAY station. Is this a problem of the software or my machine?

KISS port is set to 8100 on both HF modem (v4.6.4) and VarAS (v6.0.8)

Data Stream pane:

08:31:28 - <SENDING ASYNC MESSAGE> VMAIL RELAY NOTIFICATION: THERE ARE VMAILS WAITING FOR HB9xxx

This results in:

07/11/2022 08:31:18 - Preparing to send a VMail relay notifiaction to HB9xxx

07/11/2022 08:31:28 - Sending Async message: TO:HB9xxx FROM:VK6II Data:<SMP>

07/11/2022 08:31:29 - Error: Unable to send KISS message to VARA modem. Disconnecitng modem.

07/11/2022 08:31:29 - Unable to write data to the transport connection: An established connection was aborted by the software in your host machine.

at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)

at VarAC.VarAC.command_varahf_kiss(TcpClient conn, Byte[] msg)

07/11/2022 08:31:29 - Restarting VARA modem 1/2

07/11/2022 08:31:29 - Disconnecting VARA modem...

07/11/2022 08:31:29 - Disconnected!

07/11/2022 08:31:30 - Error in mailbox_send_outbox_thread

07/11/2022 08:31:30 - Error: Unable to read data from command stream of VARA modem. Disconnecitng modem command stream.

07/11/2022 08:31:30 - Error: processing Modem data stream: Thread was being aborted.

at System.Net.UnsafeNclNativeMethods.OSSOCK.recv(IntPtr socketHandle, Byte* pinnedBuffer, Int32 len, SocketFlags socketFlags)

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, SocketError& errorCode)

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

at VarAC.VarAC.<button_connect_varahf_Click>b__566_2()

07/11/2022 08:31:30 - Thread was being aborted.

at System.Net.UnsafeNclNativeMethods.OSSOCK.recv(IntPtr socketHandle, Byte* pinnedBuffer, Int32 len, SocketFlags socketFlags)

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, SocketError& errorCode)

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

at VarAC.VarAC.<button_connect_varahf_Click>b__566_0()

07/11/2022 08:31:30 - Unable to read data from data stream of VARA modem. Disconnecitng modem data stream.

07/11/2022 08:31:30 - Thread was being aborted.

at System.Threading.Thread.SleepInternal(Int32 millisecondsTimeout)

at System.Threading.Thread.Sleep(Int32 millisecondsTimeout)

at VarAC.VarAC.<button_connect_varahf_Click>b__566_4()

07/11/2022 08:31:40 - Connecting VARA Main Modem Command interface...

07/11/2022 08:31:40 - Connecting VARA Main Modem KISS Command interface...

07/11/2022 08:31:40 - Connecting VARA Main Modem data stream...

07/11/2022 08:31:40 - Connected to VARA modem

07/11/2022 08:31:40 - Setting Bandwith to 500Hz

07/11/2022 08:31:40 - Error: Sending relay notification failed: Thread was being aborted.

at VarAC.VarAC.command_varahf_kiss(TcpClient conn, Byte[] msg)

at VarAC.VarAC.<>c__DisplayClass539_0.<Load_configuration>b__1()

07/11/2022 08:31:40 - VARA version: VARA HF v4.6.4