** On entry to ZHSEQR parameter number 4 had an illegal value ERROR

[Pablo Pinedo]

Good afternoon,

When running my code attached, I am running into an error when N >= 8. After the state has evolved for about 14 seconds (of 20 seconds), I get the following error:

** On entry to ZHSEQR parameter number  4 had an illegal value
 ** On entry to ZGEBAL parameter number  3 had an illegal value
 ** On entry to ZGEHRD  parameter number  2 had an illegal value
 ** On entry to ZUNGHR ZUNGQR parameter number  2 had an illegal value

I could not find much information for what caused this error, and I was hoping to get some guidance on how to get rid of it or avoid it.

I'm not sure if this is significant, but the error seemed to start popping up when I added an InfiniteFunction term:

H.AddMPOTerm('InfiniteFunction', ['sigmax','sigmax'], hparam='J', weight=1.0, func=powerlaw, L=N, tol=1e-12)

Thank you for any help!