Import Photos Powershell Management Agent

Hello , 

i'am using the powershell management agent to import photo to Metaverse but when i run a full import i have some errors 

"Microsoft.MetadirectoryServices.ExtensibleExtensionException: Unable to cast object of type 'System.Byte[]' to type 'System.Object[]'.
   at Granfeldt.PowerShellManagementAgent.GetImportEntries(GetImportEntriesRunStep importRunStep)
Forefront Identity Manager 4.1.3441.0"

any idea ? 

Thanks