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Under review

Exit function in programme makes KNX to disconnect

Paul G 2 weeks ago in bOS Configurator updated 1 week ago 5

Hi,

When the exit function is used in a programme, bOS makes de KNX to restart completely, the only thing that should happen is for the programme logic to finish, however KNX is restarted. It took me some time to find out this, to the point that I had to put traces so that when the building and KNX were connected a trace would be logged.

I tis now confirmed, every single programme that includes the Exit sentence makes the building to restart, a significant bug to get fixed ASAP

hi, comfortclick team, ay luck with this one?

+1

Hi,

I think that some additional info would be useful for them:

What server version are you using?

Have you already tried to backup the configuration, reload / restart the server and import the configuration again?


Not saying that's not a bug. But sometimes we push the servers so much back and forward, that the software gets lunatic. And sometimes a restart or reload helps. It won't hurt trying :-)

May I ask in what conditions you're using the exit function? I use tasks a lot, and never used exit in any of them.

Also, even if it's a bug, it will take time to fix. And probably it will be pushed under other bug priorities.

Best regards

Thanks Ricardo, I am using the latest version of server 4.7

Yes, all sort of tricks refreshing config..ect have been attempted, though that should not be necessary if proper memory management is done and hence memory allocation space allocated to procceseses is properly cleaned by the OS after usage. 


The exit function is being used for what it has to be used for, the weird thing is that it basically makes bOS to abend, effectively kicking out the KNX connection. One I have remove use of Exit no more abends, which is a nice coincidence, or a fact.

The exit function is properly used in programming to avoid further CPU waste by using it within nested if logics, so effectively, plus further triggering the OS to clean and wipe memory usage, all programming languages wipe out the working memory allocated to them by the OS once an exit sentence is invoked

The following two programmes do the same, but one uses higher CPU consumption than the other,

Programme A (series of IFs)

IF X THEN Y EXIT

ELSE DO Z EXIT

IF W THEN F EXIT

ELSE DO O EXIT

Programme B

IF X THEN Y

ELSE 

   IF W THEN F

   ELSE DO O

EXIT    

Under review

Hello Paul,

can you send us a screenshot of the program you use that causes the KNX to restart? We haven't noticed this issue so far and noone else reported it and exit function is used in many of our program tasks, without any KNX disconnects.

Best regards.

Hi, I put back the exit in the programmes I removed it from and get the details once it abends again