Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

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Posted on by Shahbaaz Ansari

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Hi All,

I am getting below error, i have create workflow activity and i have registered it but when it execute it, it is giving error

Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Thanks,

Shahbaaz

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Pawan Nilank 30 on at

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RE: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Hi Shahbaaz,

What have you done with newton json .dll ? I'm also getting similar error from a registered plugin. Please share the solution.

Regards,

Pawan
Shahbaaz Ansari 6,211 on at

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RE: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Hi Michel,

I resolved it by updating the newton soft json dll.

Thanks for your help.

Shahbaaz
Michel van den Brink 4,697 on at

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RE: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Hello Shahbaaz,

In Dynamics 365 Online everything runs in Isolation Mode (sandbox)

There are a lot of assemblies, both third-party and Microsoft owned that are not on the whitelist (trusted) for running in Dynamics 365

For more about this:

https://docs.microsoft.com/en-us/dynamics365/customer-engagement/developer/plugin-isolation-trusts-statistics

Without the source code it's difficult to pinpoint the exact issue. Do you have a stack trace perhaps?
Shahbaaz Ansari 6,211 on at

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RE: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

thanks Michel,

I dont have the code, i just have dll file that i have updated, and while calling that workflow activity i am getting above error. i check many article on community it says register dll on isolation mode :NONE, i tried it but no luck
Michel van den Brink 4,697 on at

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RE: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Hello,

Can you share the part of the source code where this exception occurs?

It looks like it's a trust issue with an assembly you are trying to reference.