in dev val 4, all reco mc test are crashing with:

magfieldathenasvc                                   fatal cannot locate magfield /build/atnight/localbuilds/nightlies/17.0.x-val/atlasconditions/rel_0/installarea/share/bmagatlas05_test2.data from ${datapath}
magfieldathenasvc                                   error failed to initialise field from cool
nameauditor                                          info just exited magfieldathenasvc[0x1256075c]+31 with auditor trigger callback
memstatauditor                                       info memory usage has changed after magfieldathenasvc[0x1256075c]+31 with auditor trigger callback 	virtual size = 967.824 mb 	resident set size = 754.703 mb deltavsize = 0  mb 
iovsvctool                                          error problems calling magfieldathenasvc[0x1256075c]+31
iovsvctool                                          error problems preloading iovranges
incidentsvc                                         error standard std::exception is caught handling incident0xffe4e820
incidentsvc                                         error iovsvctool::preloadproxies
traceback (most recent call last):
  file &quot;/build/atnight/localbuilds/nightlies/17.0.x-val/atlascore/rel_0/installarea/joboptions/athenacommon/runbatch.py&quot;, line 11, in &lt;module&gt;
    theapp.run()     # runs until theapp.evtmax events reached
  file &quot;/build/atnight/localbuilds/nightlies/17.0.x-val/atlascore/rel_0/installarea/python/athenacommon/appmgr.py&quot;, line 623, in run
    sc = self.gethandle()._evtpro.executerun( nevt )
runtimeerror: (file &quot;&quot;, line 0) std::exception (c++ exception)

see for example 
http://atlas-computing.web.cern.ch/atlas-computing/links/builddirectory/nightlies/devval/atlasreconstruction/rel_4/nicos_area/nicos_testlog170xval32bs5g4recopt/reconstruction_recexample_recexrecotest_26__recexrecotest_testconfiguration__recoshift_esd__a.loglog

can be reproduced with
asetup devval,rel_4
recexcommon_links.sh
athena recexcommon/rdotoesdnotrigger.py

this is probably due to bfieldath-01-07-19 now postponed


