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This may occur in a multiple scan engine environment if a config file for one server has been accidentally copied to another server. The database connection string is encrypted using a key derived from the local Windows system and cannot be moved between systems. In this case the install.log will contain an error like the following: (note that additional line breaks have been added for readability) A user will normally not encounter this on a scan engine in active use, as the scan engine will be unable to communicate with the SQL Server Database in this configuration. It may however happen on a UI Only server, or following a backup/restore or server clone scenario.
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Looking for existing properties in C:\Program Files\iQuate\iQSonar ScanEngine 4.0\bin\iQuate.iQSonar.ScanEngine.exe.config
Exception thrown by custom action:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
---> System.Configuration.ConfigurationErrorsException:
Failed to decrypt using provider 'DataProtectionConfigurationProvider'.
Error message from the provider: Key not valid for use in specified state. (Exception from HRESULT: 0x8009000B)
(C:\Program Files\iQuate\iQSonar ScanEngine 4.0\bin\iQuate.iQSonar.ScanEngine.exe.config line 27)
---> System.Runtime.InteropServices.COMException: Key not valid for use in specified state. (Exception from HRESULT: 0x8009000B)
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