Complex strings as positional parameters

I’m passing in several file paths as positional parameters to a script like this:

powershell -nologo -file .\Create-AnalysisProps.ps1 "14" "2010=10;2012=11;2013=12;2015=14" 
    "d:\Program Files (x86)\Microsoft Visual Studio ##.0\Team Tools\Static Analysis Tools\FXCop\FXCopCmd.exe" 
    "d:\Program Files (x86)\Microsoft Visual Studio ##.0\Team Tools\Static Analysis Tools\Rule Sets\" 
    "d:\Program Files (x86)\Microsoft Visual Studio ##.0\Team Tools\Static Analysis Tools\FxCop\Metrics.exe" 
    "d:\Program Files (x86)\Microsoft Visual Studio ##.0\Common7\IDE\mstest.exe" 

I’m getting the following error:

.ps1 : A positional parameter cannot be found that accepts argument 'Studio'.

Here’s the Param section of my script:

	# VS Version

	# Version Table

	# FXCopCmdTemplate
	[String]$FXCopCmdTemplate="C:\VS ##\Test Tools\FXcopcmd.exe",

	# FXCopRulesTemplate
	[String]$FXCopRulesTemplate="C:\VS ##\Rule Sets\",

	# MSMetricsTemplate
	[String]$MSMetricsTemplate="C:\VS ##\Test Tools\Metrics.exe",

	# VSTest Template
	[String]$VSTestTemplate="C:\VS ##\Test Tools\MSTest.exe",

	# Output XML File Location

All my strings are wrapped in quotes. Any idea why this would behave this way? I have other scripts that accept file paths as strings with no problems…

I’m not sure what’s doing this, but that trailing backslash before the closing quotation mark in “d:\Program Files (x86)\Microsoft Visual Studio ##.0\Team Tools\Static Analysis Tools\Rule Sets” is somehow escaping the closing quote and screwing up all the rest of the input. The PowerShell engine doesn’t do this; it must be something going on with the console subsystem, or maybe it’s something powershell.exe does when you’re passing in arguments (so quotes can be escaped from cmd.exe / etc.)

If you’re doing this from inside a powershell session already, there’s no reason to make another call to powershell.exe. Just do this instead, and the problem goes away:

.\Create-AnalysisProps.ps1 "14" # The rest of your really long command line

If you do need to be calling powershell.exe, then doubling up that trailing backslash works:

“d:\Program Files (x86)\Microsoft Visual Studio ##.0\Team Tools\Static Analysis Tools\Rule Sets\”

I do need to call PowerShell from Cmd.exe, it’s part of a bigger .cmd file where those values actually come from previous steps as %var1% cmd variables. The pre-substitution command looks like:

powershell -file .\Create-AnalysisProps.ps1 "%ver%" "%vertable%" "%fxpath%" etc

Changing the one parameter with the trailing backslash to a double-backslash did the trick. At least the parameters are getting into the script now. Of course I have issues within the script but (theoretically) I can solve those.