NullReferenceException in nameplate viewer DNP when trying to update AAS

[WelliSolutions]

Describe the bug I want to create a digital nameplate with the help of digital nameplate viewers.

To Reproduce Steps to reproduce the behavior:

1. Create a new AAS
2. At the AAS, click "Create new submodel of kind instance"
3. Click "Create data element" for semanticId
4. Choose ModelReference
5. Click "Add blank"
6. Choose Submodel
7. Enter https://admin-shell.io/zvei/nameplate/1/0/Nameplate
8. Save the AASX file. This will trigger the display of the nameplate viewers.
9. Click on the viewer DNP
10. At the property "ManufacturerName", click on +
11. Choose a language
12. Enter "Test" as the manufacturer name
13. Click "Update to AAS"
14. An exception occurs

Log:

[AasxPluginGenericForms] Error: when adding Document: 
Object reference not set to an instance of an object. 
Object reference not set to an instance of an object. at 
   at AasxIntegrationBase.AasForms.FormInstanceSubmodelElement.AddOrUpdateSmeToCollection(List`1 collectionNewElements, AdminShellPackageEnv packageEnv, Boolean addFilesToPackage) 
   in D:\a\aasx-package-explorer\aasx-package-explorer\src\AasxIntegrationBase\AasForms\FormInstance.cs:line 1198
   at AasxIntegrationBase.AasForms.FormInstanceListOfSame.AddOrUpdateSameElementsToCollection(List`1 elements, AdminShellPackageEnv packageEnv, Boolean addFilesToPackage) 
   in D:\a\aasx-package-explorer\aasx-package-explorer\src\AasxIntegrationBase\AasForms\FormInstance.cs:line 502
   at AasxIntegrationBase.AasForms.FormInstanceListOfDifferent.AddOrUpdateDifferentElementsToCollection(List`1 elements, AdminShellPackageEnv packageEnv, Boolean addFilesToPackage) 
   in D:\a\aasx-package-explorer\aasx-package-explorer\src\AasxIntegrationBase\AasForms\FormInstance.cs:line 326
   at AasxIntegrationBase.AasForms.FormInstanceSubmodel.AddOrUpdateDifferentElementsToCollection(List`1 elements, AdminShellPackageEnv packageEnv, Boolean addFilesToPackage, Boolean editSource) 
   in D:\a\aasx-package-explorer\aasx-package-explorer\src\AasxIntegrationBase\AasForms\FormInstance.cs:line 1072
   at AasxPluginGenericForms.GenericFormsAnyUiControl.ButtonTabPanels_Click(String cmd) in D:\a\aasx-package-explorer\aasx-package-explorer\src\AasxPluginGenericForms\GenericFormsAnyUiControl.cs:line 220.

Expected behavior No exception. The nameplate viewer creates a new property for the manufacturer name.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Browser: N/A

Smartphone (please complete the following information): None

Additional context Version 2023-11-17

[juileetikekar]

Hi @WelliSolutions,

Thank you for raising the issue !!

The issue was reproduced. We will keep you informed about further updated.