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Dear all,<br class="">
<br class="">
<br class="">
The bug reported earlier today related to the initialization of our random number generator was in fact not as severe as first anticipated:<br class="">
<br class="">
Using a seed of 0 - which is the default in McStas and means using the clock as random number seed, instead implicitly indeed set the seed to 0 always. This meant that to generate two simulations with statistically different output, one would have had to set
the seed explicitly to two different values in the two cases.<br class="">
<br class="">
In any case, the bug has now been fixed in the newly released McStas 2.2a, which is available for all platforms at <a href="http://downloads.mcstas.org/mcstas-2.2" class="">http://downloads.mcstas.org/mcstas-2.2</a><br class="">
<br class="">
It further seems we have an issue with our "umbrella"-metapackage (called <b class="">mcstas-suite</b>) for both Debian and RPM systems. The solution is to explicitly install the <b class="">mcstas-suite-perl</b> and/or <b class="">mcstas-suite-python</b> packages.<br class="">
<br class="">
<br class="">
Best regards,<br class="">
<br class="">
Peter Willendrup<br class="">
<br class="">
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