This email is related to recent releases of GSL and (not GSLL): GSL 2.0 and 2.1 have been released (see http://www.gnu.org/software/gsl/ and http://git.savannah.gnu.org/cgit/gsl.git/tree/NEWS) 2.0 is now distributed by msys2 on Windows. 2.0 brought new functionality, changes to the interface and some new bugs. As far as I know gsll has not been updated yet (and that is not a critique). 2.0 compiles on Windows on CCL and SBCL with the exception of two issues: - solve-minimize-fit\solver-struct__grovel.c - There is no class named GSLL::BASIS-SPLINE. I am not sure if these errors are related to the bugs discussed in this email thread: http://lists.gnu.org/archive/html/help-gsl/2015-11/msg00006.html) On SBCL 1.30 the test summary is: Unit Test Summary | 3722 assertions total | 3658 passed | 64 failed | 19 execution errors | 0 missing tests #<TEST-RESULTS-DB Total(3722) Passed(3658) Failed(64) Errors(19)> All execution errors have to do with exception_access_violation. Mirko