我有一个类似于以下代码的功能。它接收命令和命令参数。我必须在后台运行此命令并收集输出。但是最后一条语句让我很困惑
错误：
Cannot bind argument to parameter 'Command' because it is null.
+ CategoryInfo : InvalidData: (:) [Invoke-Expression], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.InvokeExpre
ssionCommand
+ PSComputerName : localhost
码：
$cmd = 'Get-content'
$Arg = 'path to file'
$sb = "$cmd $Arg -ErrorVariable e -ErrorAction Stop"
invoke-Expression $sb #This printsoutput
$job = Start-job -ScriptBlock {Invoke-Expression $sb}
wait-job -id $job.Id
$job | Receive-job #this should print output but throwing error
我很确定最后一行是抛出错误的那一行。