PAKTool "The given path's format is not supported."

[SereninSparks]

I'm trying to create a diff pak using the PAKTool, but doing so gives the following error:

Launching PAKTool v1.7.0 action: CREATEDIFFPAK
The given path's format is not supported.
   at System.Security.Permissions.FileIOPermission.EmulateFileIOPermissionChecks(String fullPath)
   at System.Security.Permissions.FileIOPermission.QuickDemand(FileIOPermissionAccess access, String fullPath, Boolean checkForDupli
cates, Boolean needFullPath)
   at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
   at System.IO.File.Copy(String sourceFileName, String destFileName)
   at PAKTool.PAKTool.BuildDiffPAK(String _referencePAK, String _inputDir, String _diffPAKPath)
   at PAKTool.Program.Main(String[] args)

I'm running the command as follows:

G:\Steam\steamapps\common\Dead Cells\ModTools> .\PAKTool.exe -CreateDiffPak -indir .\expandedpak -refpak .\res.pak -outpak .\diff.pak

Running Powershell of CMD as Administrator doesn't help either.
The Collapse command does work.

This is on Windows 10 Home, update 1903

[飞天老酒鬼]

have you found the solution yet? I meet the same problem

[飞天老酒鬼]

i got it... the later 2 args have to use absolute paths.... i wonder which genius wrote this tool