Error on Memory > Previous

[RevitArkitek]

Describe the bug
Error after Memory > Previous. Maybe I'm using this wrong?

To Reproduce
Steps to reproduce the behavior:

1. Select a few items one at a time on a sheet.
2. Click on Memory > Previous
3. See error

Expected behavior
The last item I had selected would be re-selected.

Screenshots

Desktop (please complete the following information):

• OS: Win 10
• pyRevit Version 4.7.6:277:2021.0
• pyRevit Environment:

==> Registered Clones (full git repos)
==> Registered Clones (deployed from archive/image)
master | Deploy: "basepublic" | Branch: "master" | Version: "4.7.6" | Path: "C:\Users\MichaelCoffey\AppData\Roaming\pyRevit-Master"
==> Attachments
master | Product: "2021 First Customer Ship" | Engine: 277 | Path: "C:\Users\MichaelCoffey\AppData\Roaming\pyRevit-Master" | Manifest: "C:\Users\MichaelCoffey\AppData\Roaming\Autodesk\Revit\Addins\2021\pyRevit.addin"
master | Product: "2020.2 (Full Install)" | Engine: 277 | Path: "C:\Users\MichaelCoffey\AppData\Roaming\pyRevit-Master" | Manifest: "C:\Users\MichaelCoffey\AppData\Roaming\Autodesk\Revit\Addins\2020\pyRevit.addin"
master | Product: "2019.2 (Full Install)" | Engine: 277 | Path: "C:\Users\MichaelCoffey\AppData\Roaming\pyRevit-Master" | Manifest: "C:\Users\MichaelCoffey\AppData\Roaming\Autodesk\Revit\Addins\2019\pyRevit.addin"
master | Product: "2018.3.3 Security Fix" | Engine: 277 | Path: "C:\Users\MichaelCoffey\AppData\Roaming\pyRevit-Master" | Manifest: "C:\Users\MichaelCoffey\AppData\Roaming\Autodesk\Revit\Addins\2018\pyRevit.addin"
==> Installed Extensions
==> Default Extension Search Path
C:\Users\MichaelCoffey\AppData\Roaming\pyRevit\Extensions
==> Extension Search Paths
==> Extension Sources - Default
https://github.com/eirannejad/pyRevit/raw/master/extensions/extensions.json
==> Extension Sources - Additional
==> Installed Revits
2021 First Customer Ship | Version: 21.0.0.383 | Build: 20200220_1100(x64) | Language: 1033 | Path: "C:\Program Files\Autodesk\Revit 2021"
2020.2 (Full Install) | Version: 20.2.1.1 | Build: 20191106_1200(x64) | Language: 1033 | Path: "C:\Program Files\Autodesk\Revit 2020"
2019.2 (Full Install) | Version: 19.2.1.1 | Build: 20190108_1515(x64) | Language: 1033 | Path: "C:\Program Files\Autodesk\Revit 2019"
2018.3.3 Security Fix | Version: 18.3.3.18 | Build: 20190510_1515(x64) | Language: 1033 | Path: "C:\Program Files\Autodesk\Revit 2018"
==> Running Revit Instances
PID: 23164 | 2021 First Customer Ship | Version: 21.0.0.383 | Build: 20200220_1100(x64) | Language: 0 | Path: "C:\Program Files\Autodesk\Revit 2021"
==> User Environment
Microsoft Windows 10 [Version 10.0.18363]
Executing User: AzureAD\MichaelCoffey
Active User: AzureAD\MichaelCoffey
Admin Access: No
%APPDATA%: "C:\Users\MichaelCoffey\AppData\Roaming"
Latest Installed .Net Framework: 4.8
Installed .Net Target Packs: v3.5 v4.0 v4.5 v4.5.1 v4.5.2 v4.6 v4.6.1 v4.7 v4.7.1 v4.7.2 v4.8 v4.X
Installed .Net-Core Target Packs: v3.1.302
pyRevit CLI 0.25.0.0

[eirannejad]

Fixed and will be published with next release