Before reinstalling the component
Close the applications involved, keep a copy of the configuration and history, and check with support that the folder in question belongs to the indicated component. Do not delete the FiscalNET folder and its data due to a DUDE or ZfpLabServer server issue.
Error information “Object reference not set to an instance of an object”
This error occurs if you have set Datecs as the cash register model and the DUDE application has errors or corrupt files.
Error resolution
Uninstall the DUDE application
Delete the "Datecs Applications" folder from Program Files, then reinstall the DUDE application from the "C:\FiscalNet\Servers" folder.
If an error occurs when you try to delete the folder, it is possible that one of the files is locked, and you may need to restart the PC or manually end the respective process in Task Manager.