Powershell Invoke-Command Function within a Script

Question

I have a Powershell script file called "ExecutBizTalkAppMSI.ps1" This contains a single function called "Install-BizTalkApplication". I need to execute the function on a remote server, so I use the "Invoke-Command" cmdlet as follows:

Invoke-Command -Computer $TargetServer -FilePath .\ExecuteBizTalkAppMSI.ps1 -argumentlist $MSI, $InstallFolderOnTargetServer, $Environment

Problem is, although the target script runs (I added a Write-Host directly after the Param() section), the function "Install-BizTalkApplication" is not executed.

Can anyone please let me know what I need to do to make this happen?

You probably will need to share some actual code to get help in troubleshooting this. — JNK
– JNK, Commented Aug 1, 2012 at 12:10
I'm not so sure - I just need to know if it's possible to execute a function within a script using the Invoke-Command cmdlet. If not, then what does the target script need to look like - how does it know which function to execute? — Rob Bowman
– Rob Bowman, Commented Aug 1, 2012 at 12:20

BartekB · Accepted Answer · 2012-08-01 12:23:51Z

1

I suspect the script looks like that:

# start
function Foo {}
# end

That won't work. Two options:

get rid of function name {} and run script as is
define a function first, and run it as last step in a script

Example:

# script 1
param ($foo, $bar)
# function body...

# script 2
param ($foo, $bar)
function foo {
param ($foo, $bar)
# function body
}

foo -foo $foo -bar $bar

answered Aug 1, 2012 at 12:23

BartekB

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1 Comment

Rob Bowman Over a year ago

Thanks Bartek that worked. Since I only have a single function contained within the script file, I decided to remove the function{}

Chris N · Accepted Answer · 2012-08-01 12:24:40Z

You say it "contains a function called"... So, if you run that script on your local machine with those arguments.. i.e:

.\ExecuteBizTalkAppMSI.ps1 $MSI $InstallFolderOnTargetServer $Environment

It wouldn't work, because you're running a script which just loads a function, and then stops, correct? That's your problem.

If so, you'll need to add a param statement to the top of the script, before the function:

param($MSI, $InstallFolderOnTargerServer, $Environment)

And then at the bottom, outside of the function you'll have to add:

Install-BizTalkApplication $MSI $InstallFolderonTarget $Environment

This will allow the script to accept arguments, and then pass those arguments to a statement that calls the function.

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