Fragment of the log:

Preparing to execute si projectinfo for /repository/CorporateMeasurementTechnologies/SWProduction/Drivers/NiFpga/NiFpga.pj
Preparing to execute si viewproject for #/repository/CorporateMeasurementTechnologies#s=SWProduction/SWProduction.pj#Drivers#s=NiFpga/NiFpga.pj
Checkout directory is D:\Jenkins_ROOT\NGMP.DIRECT.Sandbox\SWProduction\Drivers\NiFpga
A clean copy is requested; deleting contents of D:\Jenkins_ROOT\NGMP.DIRECT.Sandbox\SWProduction\Drivers\NiFpga
Populating clean workspace...
java.lang.Exception: Failed to create APISession!
FATAL: null
java.util.ConcurrentModificationException
at java.util.Vector$Itr.checkForComodification(Unknown Source)
at java.util.Vector$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)