Error:Empty File Name is not Legal

Hello. My download of Sims4Studio (Wishes) has been working fine. However, now when I choose the Maxis Simple Paint Wainscoat Panelling to recolour, create a package file and then save, I receive the following error message. My Sims game is up to date and working. I uninstalled Sims4Studio using Revo Uninstaller which clears out any registry entries as well as the folder files. Then downloaded Sims4Studio again but the same error reappeared as I saved my package file. I also deleted Documents Sims4Studio files as advised. My version of Sims4Studio is 3.1.4.1.  Thank you.


The Sims 4 Studio - Version 3.1.4.1

System.AggregateException: One or more errors occurred. ---> System.ArgumentException: Empty file name is not legal.

Parameter name: destFileName

at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)

at S4Studio.Data.IO.Package.DBPFPackage.Save(String out_file, Boolean inline, String temp_path)

at S4Studio.Shared.FeatureViewModel.<>c__DisplayClass28_0.<CreateItem>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()



--- End of inner exception stack trace ---

---> (Inner Exception #0) System.ArgumentException: Empty file name is not legal.

Parameter name: destFileName

at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)

at S4Studio.Data.IO.Package.DBPFPackage.Save(String out_file, Boolean inline, String temp_path)

at S4Studio.Shared.FeatureViewModel.<>c__DisplayClass28_0.<CreateItem>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()<---

Update: Being curious I chose an object instead of a wall to recolour and everything worked fine. I then tried the wall again and the same error occurred. It was also very difficult to click on a particular wall and the 'next' button did not seem to work very well either!!