[Users] Help with Spritz + external FUKA/Kadath

[Fatemeh Hossein Nouri]

Hi all,

I’ve been trying to run Spritz using initial data generated by the latest
version of FUKA for a BNS simulation, but I’ve run into issues related to
the Kadath libraries.

At first, I was getting a mismatch error (Assertion
ndim==nbr_points.get_ndim()), which suggests an incompatibility between
Spritz’s bundled Kadath and the external version of FUKA/Kadath I used to
generate the initial data.

To fix this, I tried to build Spritz against my own external Kadath
installation (~/fuka/lib/libkadath.a) instead of the one bundled in the
Einstein Toolkit. I did this by disabling these thorns in my thornlist:
Fuka/kadath_pizza, Fuka/KadathImporter and Fuka/KadathThorn. I also added
the following lines to my
ET_2024_05/Cactus/simfactory/mdb/optionlists/<machine>.cfg

KADATH_DIR = $(HOME)/fuka

KADATH_INC_DIRS = $(KADATH_DIR)/include

KADATH_LIB_DIRS = $(KADATH_DIR)/lib


One question so far: Did I do things correctly?


Then I removed the old Kadath:


rm -rf configs/Spritz_LORENE/build/Kadath

The code compiles fine, but when I try to run the executable with my
parameter file, using the '-S' option, I get:

Error: Thorn kadathimporter not found
Error: Thorn kadaththorn not found
Activation failed - 2 errors in activation sequence

The confusing part is that my ActiveThorns line in the .par file does not
explicitly list KadathThorn or KadathImporter:

ActiveThorns = "volomnia bnstrackergen bnsanalysis pizzanumutils"

Yet Spritz fails because those thorns are missing. From what I understand,
some of the thorns I’m using (like volomnia, bnstrackergen, or bnsanalysis)
depend on KadathThorn and KadathImporter, so they are indirectly required.

The core problem:

- I need to keep KadathThorn and KadathImporter active, since my parameter
file requires them through dependencies.

- But I also need them to link against my external Kadath (
~/fuka/lib/libkadath.a) so that the FUKA initial data is compatible.

Would you have suggestions on the cleanest way to make the ET KadathThorn
and KadathImporter use my external Kadath library? Is there a recommended
workflow for this?

Thanks in advance for your help!

Bests,

Fatemeh Nouri
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