IIS7 Failed to grant minimum permission requests

Question

I get this error when I\'m using FileHelpers.dll, but my IIS is set to Full trust level so it should not be that way

That\'s the full stack trace:

Answer 1

I've seen this error in another instance where, for example, IIS is running an application or virtual path via a UNC path (i.e. \\svr\share\folder). Even if Load User Profile=true I still got the PolicyException error. It was solved by running the Code Access Security Policy Tool (Caspol.exe) to add full trust to the UNC path. Since we had both 64 bit and 32 bit of .Net 2.x and .Net 4.x, I ran it in all four environments as follows:

%SystemRoot%\Microsoft.NET\Framework\v2.0.50727\caspol.exe -pp off -m -ag 1 -url "file:////\\svr\share\folder\*"   FullTrust -exclusive on
%SystemRoot%\Microsoft.NET\Framework\v4.0.30319\caspol.exe -pp off -m -ag 1 -url "file:////\\svr\share\folder\*"   FullTrust -exclusive on
%SystemRoot%\Microsoft.NET\Framework64\v2.0.50727\caspol.exe -pp off -m -ag 1 -url "file:////\\svr\share\folder\*"   FullTrust -exclusive on
%SystemRoot%\Microsoft.NET\Framework64\v4.0.30319\caspol.exe -pp off -m -ag 1 -url "file:////\\svr\share\folder\*"   FullTrust -exclusive on

Some notes of caution:

• For .Net 4.x be sure to enable the NetFx40_LegacySecurityPolicy to true or the caspol.exe commands won't work as expected.

• Do not add duplicate entries with caspol.exe for a given environment. Run the commands below to view your entries:

  %SystemRoot%\Microsoft.NET\Framework\v2.0.50727\caspol.exe -a -lg %SystemRoot%\Microsoft.NET\Framework64\v2.0.50727\caspol.exe -a -lg %SystemRoot%\Microsoft.NET\Framework\v4.0.30319\caspol.exe -a -lg %SystemRoot%\Microsoft.NET\Framework64\v4.0.30319\caspol.exe -a -lg