Hi Robert, I am unable to reproduce this failure. Can I ask what host system and toolchain you are using? Also which of the configs in sel4test? Adrian On Mon 17-Apr-2017 6:03 PM, Robert Kaiser wrote: Hi all, I just tried to run the test suite on iMX6. Using the current version from github, I got this result: ---------------------------- ..... Test suite failed. 200/202 tests passed. 200/202 tests passed. *** FAILURES DETECTED *** ---------------------------- Further checking into the log shows this: ---------------------------- ..... Starting test 51: TEST_SCHED0004 TEST_SCHED0004 Running test SCHED0004 (Test threads at all priorities) _allocman_cspace_alloc@allocman.c:252 Regular cspace alloc failed, and failed from watermark vka_alloc_object_at_maybe_dev@object.h:46mailto:vka_alloc_object_at_maybe_dev@object.h:46 Failed to allocate cslot: error 1 new_pages_at_vaddr@vspace.c:331mailto:new_pages_at_vaddr@vspace.c:331 Failed to allocate page sel4utils_configure_thread_config@thread.c:77mailto:sel4utils_configure_thread_config@thread.c:77 ipc buffer allocation failed Assertion failed: error == 0 ([.....]/seL4test/apps/sel4test-tests/src/helpers.c: create_helper_thread: 346) Failure: result == SUCCESS at line 343 of file [.....]/seL4test/apps/sel4test-driver/src/main.c Failure: Test check failure (see log). at line 0 of file ..... ---------------------------- The same test is run a second time further down below the log, giving the same result. I tested this on two different IMX6 platforms (SabreLite and Wandboard). Both showed identical results. Is this a known problem? Cheers Robert