Mikhail, haven't  you considered to keep the time series in Cache and use Grafana directly? @David Loveluck  seems got something working in this direction: https://community.intersystems.com/post/using-grafana-directly-iris. Cashe/IRIS is powerful database, so another database in the middle feels  like Boeing using parts from Airbus.

No, it is not about breakpoints.  With no breakpoints set, the debugger will just exit without any error messages and with two lines printed into Output window:

Das Programm wurde beendet.
Ziel hat den Debugger beendet

But now, with one particular database, I'm getting popup window with "#error 6704 Kein Anbinden möglich'
which I never seen for > 10 years of using the debugger.

Thanks, I'm aware of deleteexten qualifier.

Regarding to "should never": to me, reasonable way to solve unexpected issue is:

  • spend fair amount of time trying to solve the problem alone bothering no one except Google.
  • ask your colleagues who knows your context and can look on your monitor.
  • approach Community with a clear question hoping some one seen this problem before.
  • start composing materials the support needs for the investigations and prepared for waiting for the answer.