A parameterized build where the checkpoint is given as a text parameter
the follwoing exception is thrown:
FATAL: No such property: Release_Checkpoint for class: Script1
groovy.lang.MissingPropertyException: No such property: Release_Checkpoint for class: Script1
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:50)
at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:231)
at Script1.run(Script1.groovy:1)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:580)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:618)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:589)
at hudson.scm.IntegrityCheckpointAction.evalGroovyExpression(IntegrityCheckpointAction.java:86)
at hudson.scm.IntegritySCM.buildEnvVars(IntegritySCM.java:536)
at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:918)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:90)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:66)
at org.jenkinsci.plugins.preSCMbuildstep.PreSCMBuildStepsWrapper.preCheckout(PreSCMBuildStepsWrapper.java:122)
at jenkins.scm.SCMCheckoutStrategy.preCheckout(SCMCheckoutStrategy.java:78)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:559)
at hudson.model.Run.execute(Run.java:1670)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:231)

The Project is configured as followed:
#/_Projects/XYZ#ABC/ABCD/EFGH/CDE/UVW#$Release_Checkpoint

where $Release_Checkpoint is the given paramter. Also the format ${Release_Checkpoint} does throw the exception.

The only LogEntry is
Feb 17, 2014 9:30:57 AM [DEBUG] IntegritySCM - buildEnvVars() invoked...!