Clientlaunch ignoring INTERVAL, gaps in graphs, Failed to get a message

Hi all.

I'm having a funny issue on a custom graph. or multiples.
xymon client 4.2.0 on HP-UX 11.11
I'm trying to get the compiler to run so i can upgrade to 4.3.2, but in the
meantime i'm still having this issue.

Having a custom graph or two in ext/<customgraph.sh>

in clientlaunch.cfg is the following
[diskstat]
      ENVFILE $HOBBITCLIENTHOME/etc/hobbitclient.cfg
      CMD $HOBBITCLIENTHOME/ext/diskstat.sh
      LOGFILE $HOBBITCLIENTHOME/logs/diskstat.log
      INTERVAL 5m

When I look at the graphs, there are gaps.
When i do a ps I see multiple instances of the script internals.
When i do time checks in the script, i see that the script is executed once
every minute, telling that it is ignoring the INTERVAL 5m setting in
clientlaunch.cfg

Is there any particular known bugs I should be aware of?

This also generates the message
Failed to get a message, terminating, due to the status files being
overwritten and mangled due to the process that takes 4 minutes to complete
being started every minute.

Any ideas?