Prefix string too short

When trying to deploy a Visual web application from Netbeans i get: java.lang.IllegalArgumentException: Prefix string too short

19:43:01,265 ERROR [TomcatDeployer] Error during deployment: vfsfile:/C:/jboss-5.0.0.Beta2/server/default/deploy/JB.war
org.jboss.deployers.spi.DeploymentException: Failed to create web module
at org.jboss.web.deployers.AbstractWarDeployer.deploy(AbstractWarDeployer.java:405)
at org.jboss.web.deployers.AbstractWarDeployer.deploy(AbstractWarDeployer.java:78)
at org.jboss.deployers.plugins.deployers.helpers.AbstractSimpleRealDeployer.deploy(AbstractSimpleRealDeployer.java:56)
at org.jboss.deployers.plugins.deployer.AbstractSimpleDeployer.commitDeploy(AbstractSimpleDeployer.java:52)
at org.jboss.deployers.plugins.deployer.DeployerWrapper.commitDeploy(DeployerWrapper.java:170)
at org.jboss.deployers.plugins.deployment.MainDeployerImpl.commitDeploy(MainDeployerImpl.java:592)
at org.jboss.deployers.plugins.deployment.MainDeployerImpl.process(MainDeployerImpl.java:476)
at org.jboss.deployers.plugins.deployment.MainDeployerImpl.process(MainDeployerImpl.java:406)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:121)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:110)
at org.jboss.profileservice.aop.MainDeployerAspect.process(MainDeployerAspect.java:53)
at org.jboss.aop.advice.org.jboss.profileservice.aop.MainDeployerAspect_z_process_31342381.invoke(MainDeployerAspect_z_process_31342381.java)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at AOPContainerProxy$0.process(AOPContainerProxy$0.java)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:302)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:234)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:280)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:135)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:65)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:142)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:166)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.IllegalArgumentException: Prefix string too short
at java.io.File.createTempFile(File.java:1423)
at org.jboss.web.deployers.AbstractWarDeployer.deploy(AbstractWarDeployer.java:321)
... 28 more
19:43:01,765 WARN [HDScanner] Failed to process changes
org.jboss.deployers.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):

• • • DEPLOYMENTS IN ERROR: Name -> Error

vfsfile:/C:/jboss-5.0.0.Beta2/server/default/deploy/JB.war -> java.lang.IllegalArgumentException: Prefix string too short

at org.jboss.system.server.profileservice.hotdeploy.HDScanner.checkIncomplete(HDScanner.java:346)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:303)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:234)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:280)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:135)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:65)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:142)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:166)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)