Hi Jan,
I was looking for those errors and it seems that it is some kind of CUDA issue.
Can you please look if you have selected the right GPU in the reconstruction settings:
Regarding the illegal memory issue: https://blog.fearcat.in/a?ID=01650-130edb7b-76e3-440e-abce-cca06f7a6d48
An unspecified launch failure is almost always a segfault.