Powershell error A positional parameter cannot be found that accepts argument

Try it like this:

powershell.exe -Command "'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.Executor.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.ExportService.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.WorkerService.exe', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.StreamingService.exe', 'C:\Program Files\app\folder\Transformation Server\productname.CEBPM.CPUServer.ServiceHost.exe.config' | Set-Content -Path C:\Temp\filepath.txt"

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Thanks oBdA, trying it now

unfortunately, it still fails

2019-02-22 11:28:59,697 [ERROR] Command 2-addConfigFilesPath (powershell.exe powershell.exe Set-Content -Path C:\filepath.txt -Value "'C:\Program Files\Kofax\TotalAgility\Agility.Server.Web\web.config', 'C:\Program Files\Kofax\TotalAgility\Agility.Server.Web\web.config', 'C:\Program Files\Kofax\TotalAgility\CoreWorkerService\Agility.Server.Core.Executor.exe.config', 'C:\Program Files\Kofax\TotalAgility\CoreWorkerService\Agility.Server.Core.ExportService.exe.config', 'C:\Program Files\Kofax\TotalAgility\CoreWorkerService\Agility.Server.Core.WorkerService.exe', 'C:\Program Files\Kofax\TotalAgility\CoreWorkerService\Agility.Server.StreamingService.exe', 'C:\Program Files\Kofax\TotalAgility\Transformation Server\Kofax.CEBPM.CPUServer.ServiceHost.exe.config' | Set-Content -Path C:\Temp\filepath.txt") failed
2019-02-22 11:28:59,697 [DEBUG] Command 2-addConfigFilesPath output: Set-Content : A positional parameter cannot be found that accepts argument 
'Files\Kofax\TotalAgility\Agility.Server.Web\web.config'.

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However, if I use below, file gets created but all in single line, where we expect it in multiple lines
 2-addConfigFilesPath:
  command:

    powershell.exe (Set-Content -Path C:\filepath.txt -Value 'C:\Program Files\app\folder\Agility.Server.Web\web.config`nC:\Program Files\app\folder\Agility.Server.Web\web.config`nC:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.Executor.exe.config`nC:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.ExportService.exe.config`nC:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.WorkerService.exe`nC:\Program Files\app\folder\CoreWorkerService\Agility.Server.StreamingService.exe`nC:\Program Files\app\folder\Transformation Server\productname.CEBPM.CPUServer.ServiceHost.exe.config')

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If you're using that as described in
https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/ec2-windows-user-data.html
then the syntax would need to be (basically the part inside the double quotes from the command above):

<powershell>
'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.Executor.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.ExportService.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.WorkerService.exe', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.StreamingService.exe', 'C:\Program Files\app\folder\Transformation Server\productname.CEBPM.CPUServer.ServiceHost.exe.config' | Set-Content -Path C:\Temp\filepath.txt
</powershell>

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Hi OBdA,
pls check the attached ps script (only powershell portion), execution log from the target windows server. you can see how aws converts this ps script on the target server.

you could see I replace `n with newline char in step3 after above step2 create file. I think the logic what I have in step 3 is incorrect and producing different output

pls suggest :)
cfn-powershell.yaml
cfn.zip

In that yaml format, the second command would need to be

powershell.exe 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.Executor.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.ExportService.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.WorkerService.exe', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.StreamingService.exe', 'C:\Program Files\app\folder\Transformation Server\productname.CEBPM.CPUServer.ServiceHost.exe.config' | Set-Content -Path C:\Temp\filepath.txt

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and the third will not be required anymore.

sorry, didnt work
Please check the new log :)
cfn1.zip

I'd need the exact, actual, "script" file you create in order to help.

If I provide, I would really confuse you :)
moreover I have to strip off some code and it would it make sense to you...sorry.

have attached bit more into.

Pls note:  for testing, if I update the file manually and test rest of the scenario...they work fine.
ec2.yaml

Well, you're not entering what I posted.
You added Set-Content -Path C:\filepath.txt -Value at the beginning.
That does not belong there. I posted the complete command to use, not just the value to pass to Set-Content.
The third command will be unnecessary, because the command I posted will create CRLF separated lines.
In that yaml syntax, the complete command (Set-Content appears at the end!) needs to be

powershell.exe 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.Executor.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.ExportService.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.WorkerService.exe', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.StreamingService.exe', 'C:\Program Files\app\folder\Transformation Server\productname.CEBPM.CPUServer.ServiceHost.exe.config' | Set-Content -Path C:\filepath.txt

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Apologies, I thought you missed it or typo ...sorry
Trying now

I get his error

2019-02-22 13:48:22,242 [ERROR] Command 2-addConfigFilesPath (powershell.exe 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\Agility.Server.Web\web.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.Executor.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.ExportService.exe.config', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.Core.WorkerService.exe', 'C:\Program Files\app\folder\CoreWorkerService\Agility.Server.StreamingService.exe', 'C:\Program Files\app\folder\Transformation Server\productname.CEBPM.CPUServer.ServiceHost.exe.config' | Set-Content -Path C:\filepath.txt) failed
2019-02-22 13:48:22,242 [DEBUG] Command 2-addConfigFilesPath output: 'Set-Content' is not recognized as an internal or external command,

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Thanks, testing now

I think, you did it..thanks :)

I did a mistake/typo. let me retest :)

You are fantastic eBdA, it worked.

one of my other logic failed during step 5 (backup), Reason, file did not exist on that server.
Current line

powershell.exe foreach($line in Get-Content C:\filepath.txt){Copy-Item $line -Destination 'C:\Backup'}

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With your Test-Path suggestion. Is this correct?

 powershell.exe foreach($line in Get-Content C:\filepath.txt) {If (Test-Path -Path $line) {Copy-Item $line -Destination 'C:\Backup'}}

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Yes, that should work.

yes, it worked oBdA, Thanks a lot!

You have lots of patience too :)