Error "The path is not of a legal form" on execute nuget pack

I try to make a Nuget package for my solution made in c#, also this one has a lot of projects on that solution.

I running this script

.\nuget.exe pack PrincipalSolution.csproj -IncludeReferencedProjects -Build -Force -Properties "Configuration=Debug;Platform=x64" -Verbosity "detailed"

but i have this error on the Package Manager Console

System.ArgumentException: The path is not of a legal form.
   at System.IO.Path.LegacyNormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
   at System.IO.Path.GetFullPathInternal(String path)
   at System.IO.FileSystemEnumerableIterator`1..ctor(String path, String originalUserPath, String searchPattern, SearchOption searchOption, SearchResultHandler`1 resultHandler, Boolean checkHost)
   at System.IO.Directory.EnumerateFiles(String path, String searchPattern, SearchOption searchOption)
   at NuGet.CommandLine.ProjectFactory.GetFiles(String path, ISet`1 fileNames, SearchOption searchOption)
   at NuGet.CommandLine.ProjectFactory.AddOutputFiles(PackageBuilder builder)
   at NuGet.CommandLine.ProjectFactory.RecursivelyApply(Action`1 action, Object alreadyAppliedProjects)
   at NuGet.CommandLine.ProjectFactory.RecursivelyApply(Action`1 action, Object alreadyAppliedProjects)
   at NuGet.CommandLine.ProjectFactory.RecursivelyApply(Action`1 action)
   at NuGet.CommandLine.ProjectFactory.CreateBuilder(String basePath, NuGetVersion version, String suffix, Boolean buildIfNeeded, PackageBuilder builder)
   at NuGet.Commands.PackCommandRunner.BuildFromProjectFile(String path)
   at NuGet.Commands.PackCommandRunner.BuildPackage()
   at NuGet.CommandLine.PackCommand.ExecuteCommand()
   at NuGet.CommandLine.Command.ExecuteCommandAsync()
   at NuGet.CommandLine.Command.Execute()
   at NuGet.CommandLine.Program.MainCore(String workingDirectory, String[] args)

My project does not have any broken reference, is any other thing i should to validate or aggregate?

Thanks