For brittle fracture, you can directly set the failure flags in the user material code. See the section on "Failure" in Appendix A of the Keyword Manual, and also look in the umat code for how failel or failels is set
GISSMO provides ductile fracture using an evolving damage quantity, as described in the manual
Also, can I presume from this post that you have managed to compile the usermat package successfully on Windows?
You are navigating away from the AIS Discovery experience