Problem 1657

Summary:	seeds specified in /random/setSeeds ignored in MT mode
Product:	Geant4	Reporter:	smueller <stefan.mueller>
Component:	run	Assignee:	Andrea Dotti <andrea.dotti>
Status:	RESOLVED FIXED
Severity:	major
Priority:	P5
Version:	10.0
Hardware:	All
OS:	All

Description smueller 2014-07-17 17:36:51 CEST

Running in multi-threaded mode, seeds specified in "/random/setSeeds ..." are ignored, one gets always the same random number sequence (verified by Alberto Ribon).

Comment 1 Andrea Dotti 2014-07-21 18:30:12 CEST

Hello,
a fix has been provided in tag run-V10-00-17 and it will be included in the next patch release. 
For users that need this right now the fix can be implemented changing line 399 in file <g4source>/source/run/src/G4RunMessenger.cc. 
http://www-geant4.kek.jp/lxr/source/run/src/G4RunMessenger.cc#L399

The line, currently:
  CLHEP::HepRandom::setTheSeeds(seeds);

Should be changed to:
  G4Random::setTheSeeds(seeds);


Recompilation is needed.

Regards,
Andrea