Dear Argobots Users and Developers, Hello. Finally, we will release Argobots 1.0 in a few weeks. Argobots 1.0 will not support the following deprecated functions and constants: retain/release: (https://github.com/pmodels/argobots/pull/138) ABT_thread_retain(), ABT_thread_release(), ABT_task_retain(), and ABT_task_release(). Reason: fundamentally, there is no good way to fix bugs in these functions without sacrificing performance. xstream: (https://github.com/pmodels/argobots/pull/147) ABT_xstream_start(), ABT_XSTREAM_STATE_CREATED, and ABT_XSTREAM_STATE_READY Reason: CREATED and READY states are merged to RUNNING. ABT_xstream_start(), which takes a READY execution stream, becomes useless. event: (https://github.com/pmodels/argobots/pull/144) ABT_event_add_callback(), ABT_event_del_callback(), ABT_event_prof_start(), ABT_event_prof_stop(), ABT_event_prof_publish(), ... Reason: event features (energy-efficient scheduling and scheduler profiling) should not be integrated into Argobots; they should be implemented on top of it. Please check whether your programs are using them. If these functions are really necessary, please let us know so that we can offer alternative solutions or revert these changes. Please report it by writing a comment at the following (https://github.com/pmodels/argobots/issues/156) or reply to this mail. I am deeply sorry for already merging these changes to the master branch. We will inform you of API changes ahead of time. If you have any questions, please feel free to ask me. Best Regards, Shintaro Iwasaki