Closed Issue: Issue with AsyncExec task [12275]

Hi, I seem to be getting an internal error with the AsynxExec task. It is intermittent.

From the build log - on this occasion I happen to be trying to execute a batch file in this example, but it fails with the same error on other tasks. I'm using version 3.5

Am I the only one with this issue ?

Using "MSBuild.ExtensionPack.Framework.AsyncExec" task from assembly "E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\MSBuild.ExtensionPack.dll".
Task "MSBuild.ExtensionPack.Framework.AsyncExec"
Command: E:\Source\PsTools\psexec.exe -accepteula \\NWPAPPFSTU10 -u nwp-biz\svc-nwptfssrv -p ?3x0du10 -i -high cmd /c "E:\BatchScripts\BuildScripts\42\CleanFASTCollections.bat" RUSSIAC AUSTRIAC RXRUC IBERIAC ITALYC
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: The "MSBuild.ExtensionPack.Framework.AsyncExec" task failed unexpectedly. [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: System.IO.IOException: Cannot create a file when that file already exists. [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at System.IO.__Error.WinIOError() [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at System.IO.File.Move(String sourceFileName, String destFileName) [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at MSBuild.ExtensionPack.Framework.AsyncExec.CreateBatchProgram(String command) in D:\Projects\MSBuildExtensionPack\Releases\4.0.3.0\Main\Framework\Framework\AsyncExec.cs:line 107 [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at MSBuild.ExtensionPack.Framework.AsyncExec.<Execute>b__2(String command) in D:\Projects\MSBuildExtensionPack\Releases\4.0.3.0\Main\Framework\Framework\AsyncExec.cs:line 70 [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext() [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at MSBuild.ExtensionPack.Framework.AsyncExec.Execute() in D:\Projects\MSBuildExtensionPack\Releases\4.0.3.0\Main\Framework\Framework\AsyncExec.cs:line 70 [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\CleanFASTCollections.targets(29,5): warning MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask, Boolean& taskResult) [E:\Builds\42\NOVA Platform\v2.10.2-Demo\BuildType\TFSBuild.proj]
The previous error was converted to a warning because the task was called with ContinueOnError=true.
Build continuing because "ContinueOnError" on the task "MSBuild.ExtensionPack.Framework.AsyncExec" is set to "true".
Done executing task "MSBuild.ExtensionPack.Framework.AsyncExec" -- FAILED.
Comments: Resolved with changeset 88004: Framework\AsyncExec.cs: Fix for file generation