Hello everyone, Could someone please explain the libtbx.easy_mp semantics to me? Currently, if you run easy_mp with multiple processes, objects are 'reset' back to their original state, ie. the state of the object in the main thread is retained, changes in the processing threads are dropped. However if you run easy_mp with the number of processes set to 1, object states are modified, because the main thread is the executing thread. How it this supposed to work? For a more detailed test please run $ libtbx.python libtbx/tst_easy_mp_state.py The source code explains the test in more detail. This behaviour currently causes dials.integrate to fail on bzipped input files. Given that this code is used in many places and this particular feature is not obvious, it may explain other anecdotal emergent behaviour, too. -Markus -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom