System SecurityException Request for Permission

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System SecurityException Request for Permission

Affected Software/Reports/DLL(s): EDP


Affected Software Version: N/A


Symptoms: When attempting to open or use a format file on a network drive, the following error occurs.


System.Security.SecurityException: Request for the permission of type

'System.Security.Permissions.FileIOPermission, mscorlib, Version=,

Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.



TargetProcedure, Object[] Arguments, Boolean[] CopyBack, BindingFlags Flags)

at Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateSet(Object

Instance, Type Type, String MemberName


Cause/Details: The following error may occur for formats on a network drive, if the security policy is not configured.


Resolution/Workaround: In certain scenarios, clients may wish to store EDP format files on network drives. Often, the .NET security policy is not configured to allow assemblies from a network drive as described here:


One option to resolve this error is to move all the files for the format (.xse, .vbe, .dll, .rvf, -enum.eml) to be located on the machine that is running EDP, not on a network drive.


Another option is to change the .NET policy to allow execution of the assemblies from the network drive.