Hello together,

I'm using BACnet4J and everything is fine when looking at it with testtools like Chipkin BACnet Explorer.
Unfortunately in my first real world application with siemens PXM10/PXC64-U controller I encountered some problems.

Siemens controller makes Who-Has request (with device instance low/high limit), but BACnet4J says com.serotonin.bacnet4j.exception.BACnetException: Error while creating APDU
When sending Who-Has with VTS (without device instance low/high limit), BACnet4J gives I-Have

wireshark capture.txt (K12)

+---------+---------------+----------+
15:49:52,131,892 ETHER
|0 |00|1c|23|b0|87|46|00|0a|e6|b5 |75|c1|08|00|45|00|00|33|03|42 |00|00|80|11|b4|ae|c0|a8|00|bc |c0|a8|00|bd|ba|c0|ba|c0|00|1f |ba|76|81|0a|00|17|01|20|ff|ff |00|ff|10|07|3d|09|00|65|69 |62|74|65|6d|70|31|

+---------+---------------+----------+
15:49:52,136,357 ETHER
|0 |00|0a|e6|b5|75|c1|00|1c|23|b0 |87|46|08|00|45|00|00|39|24|25|00 |00|80|11|93|c5|c0|a8|00|bd|c0|a8 |00|bc|ba|c0|ba|c0|00|25|7e|bc|81 |0a|00|1d|01|00|10|01|c4|02|00|04 |40|c4|00|00|00|02|75|09|00|65|69 |62|74|65|6d|70|31|

+---------+---------------+----------+
15:50:21,706,694 ETHER
|0 |00|1c|23|b0|87|46|00|0a|e6|b5 |75|c1|08|00|45|00|00|39|04|81 |00|00|80|11|b3|69|c0|a8|00|bc |c0|a8|00|bd|ba|c0|ba|c0|00|25 |6c|06|81|0a|00|1d|01|20|ff|ff |00|ff|10|07|0a|04|40|1a|04|40 |3d|09|00|65|69|62|74|65|6d |70|31|

When siemens controller requests subscribeCOV, BACnet4J gives ACK subscribeCOV, but there are no COVnotifications following, no matter how long I wait or how widely present-value is changed.

many thanks for any comments

sebastian