ERROR: Cannot run program "cvs" (in directory "\var\tmp\hudson8081005950298490320tmp"): CreateProcess error=267, The directory name is invalid
java.io.IOException: Cannot run program "cvs" (in directory "\var\tmp\hudson8081005950298490320tmp"): CreateProcess error=267, The directory name is invalid
at java.lang.ProcessBuilder.start(Unknown Source)
at hudson.Proc$LocalProc.<init>(Proc.java:192)
at hudson.Proc$LocalProc.<init>(Proc.java:164)
at hudson.Launcher$LocalLauncher.launch(Launcher.java:638)
at hudson.Launcher$ProcStarter.start(Launcher.java:273)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:793)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:767)
at hudson.remoting.UserRequest.perform(UserRequest.java:114)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: CreateProcess error=267, The directory name is invalid
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
... 16 more
IOException occurred: java.io.IOException: Cannot run program "cvs" (in directory "\var\tmp\hudson8081005950298490320tmp"): CreateProcess error=267, The directory name is invalid
cleaning up /var/tmp/hudson8081005950298490320tmp
Finished: SUCCESS

1) The build should not be successful.
2) There will not be a \var\tmp\ directory in Windows. This needs to be OS dependent.