Moltra Scheme 6 + Int 32 comp energy issue

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Michael Chen

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Aug 24, 2026, 12:10:22 AM (8 days ago) Aug 24
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Hi Dirac Experts,

I ran a calculation using the default Scheme 4 and also tried the Scheme 6 with HTSORT set to 1.

While comparing the results, it seems that there is a ~0.02 Hartree difference between these two calculations. I came across something similar being raised on Gitlab:
https://gitlab.com/dirac/dirac/-/work_items/153 
but I didn't see any resolutions yet. Should I just use scheme 4 or is there a fix for this?

Best,
Michael


Visscher, L. (Luuk)

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Aug 25, 2026, 2:09:21 AM (7 days ago) Aug 25
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Dear Michael,

Is likely a bug, but possibly different from the one listed in 153.  Can you make a comment in this issue and attach the precise output on gitlab?

We’re outphasing moltra and its variants and have limited manpower for bug fixing there. Best use scheme 4 in the meantime.

best regards,

Luuk


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