I’m having a weird error, sometimes the system crashes due to an UDF being not declared properly :

“invalid request BLR at offset 877 function F_GFORMATD is not defined module name or entrypoint could not be found”

But I can verify it is declared properly.

The same query runs without problems a lot of times (it runs every minute), but randomly it will just crash with the UDF error as if it’s non-existent/declared.

Firebird-3.0.2.32703_0_x64 on windows 2012 R2