No Connection possible to PLCSim

[Herold44]

Hello,
I have tested HarpoS7 against many different PLCsim instances in versions 14,16,18 and 19. I also tested a connection to PLCSim via NetToPLCsim as well as with direct TCP interfaces.
The result was always the same, no connection could be finally established.
No matter which PLCsim version I tested, the PLC always terminated the connection after the first SetMultiVariable telegram.

Does anyone have any idea what the problem might be?

I have attached a Wireshark recording...

harpos7connect_with_plcsim.zip

[bonk-dev]

First of all, sorry for not replying as fast recently, but school has started for me and I don't have as much time. I will check it out as soon as I find some time.