I have written a powershell script to loop through all projects on our PWA instance and when it gets to a specific one I would like to check it out. the checkout() fails with an error:
format-default : The collection has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested.

The script works perfect if I remove the CheckOut() line. Any ideas what I am doing wrong?

Add-Type -Path ‘C:\dll\microsoft.sharepointonline.csom.16.1.6906.1200\lib\net40-full\Microsoft.ProjectServer.Client.dll’ Add-Type -Path ‘C:\dll\microsoft.sharepointonline.csom.16.1.6906.1200\lib\net40-full\Microsoft.SharePoint.Client.dll’

$ PWAInstanceURL = “https://mycorp.sharepoint.com/sites/pwa” $ PWAUserName = “My User” $ password = “My Password” $ securePass = ConvertTo-SecureString $ password -AsPlainText -Force

$ projContext = New-Object Microsoft.ProjectServer.Client.ProjectContext($ PWAInstanceURL) [Microsoft.SharePoint.Client.SharePointOnlineCredentials]$ spocreds = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($ PWAUserName, $ securePass);

$ projContext.Credentials = $ spocreds

$ projects = $ projContext.Projects

$ projContext.Load($ projects) $ projContext.ExecuteQuery()

Write-Host ‘Loaded ProjContext ‘ $ projects.Count

foreach ($ project in $ projects){

if ($  project.Name -eq "Name of Project to Stop On"){     Write-Host $  project.Name $  project.Id      $  existingProj = $  projContext.Projects.GetByGuid($  project.Id)    Write-Host 'New Proj ' $  existingProj    $  newProj.CheckOut()  } 

}