Internal1 error with tau spin correlations in ttll
Reported by Rohin in ATLAS:
When using the new SPECIAL_TAU_SPIN_CORRELATIONS=1
feature (including the bug fix from #271 (closed)) in pp->ttll it errors out during event generation with:
Event 1 ( 1s elapsed / 3m 8s left ) -> ETA: Thu Dec 31 23:30 XS = 0.797168 pb +- ( 0.797168 pb = 100 % )
Sherpa: Amplitude2_Tensor::ReduceToMatrix throws fatal error:
Internal1
Attaching ATLAS-Sherpa run card and log file.