B31J SIFs causes E801-1: FATAL ERROR

Hello,

Ever since we started using B31J I've been getting E801-1 errors when trying to run the analysis. This has happened more than once unfortunately.

I've read the Q&A about E801-1 and it doesn't seem to refer to this issue, other then mentioning that something might be wrong with the stiffness matrix.

If I run the same analysis under ASME B31.3 2018 W/O B31J, the analysis runs properly, however when inserting the required SIFs for B31J and trying to run it under ASME B31.3 2020 or ASME B31.3 2018 with B31J checked, I get the error over and over again.

I have verified the SIFs, the reducers' 'a', 'R2' and 'L2's, and I'm trying to figure out what is still missing to fix the stiffness matrix if that's it.  

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