Log:

??Preparing to execute si projectinfo for /repository/CorporateMeasurementTechnologies/SWProduction/Drivers/DMM/General/project.pj
Preparing to execute si viewproject for #/repository/CorporateMeasurementTechnologies#s=SWProduction/SWProduction.pj#Drivers/DMM/General
Checkout directory is <http://ds-jenk2-1.biotronik.com:8080/job/NGMP.Direct-Drivers.DMM.General/ws/>
A clean copy is requested; deleting contents of <http://ds-jenk2-1.biotronik.com:8080/job/NGMP.Direct-Drivers.DMM.General/ws/>
Populating clean workspace...
java.lang.Exception: Failed to create APISession!
FATAL: null
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
at java.util.AbstractList$Itr.next(Unknown Source)
at hudson.scm.IntegrityCheckoutTask$ThreadLocalAPISession.remove(IntegrityCheckoutTask.java:157)
at hudson.scm.IntegrityCheckoutTask.invoke(IntegrityCheckoutTask.java:430)
at hudson.scm.IntegrityCheckoutTask.invoke(IntegrityCheckoutTask.java:28)
at hudson.FilePath.act(FilePath.java:991)
at hudson.FilePath.act(FilePath.java:969)
at hudson.scm.IntegritySCM.checkout(IntegritySCM.java:807)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1276)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:610)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:532)
at hudson.model.Run.execute(Run.java:1744)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:374)??