Issue

Error occurs when running a report on Pega Platform that uses UDF (User-Defined function).

Symptoms and Impact

Error

com.microsoft.sqlserver.jdbc.SQLServerException

An error occurred in the Microsoft .NET Framework while trying to load assembly id 65536. The server may be running out of resources, or the assembly may not be trusted. Run the query again, or check documentation to see how to solve the assembly trust issues. For more information about this error:System.IO.FileLoadException: Could not load file or assembly 'prreadstream, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An error relating to security occurred. (Exception from HRESULT: 0x8013150A)System.IO.FileLoadException: at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString)

Steps to reproduce

Run a report on Pega Platform that uses UDF (User-Defined Function) prreadstream and SQL Server 2019 with trustworthy property set to OFF as per,

TRUSTWORTHY database property

Root Cause

On MSSQL 2017+, the default security policy is set to clr strict.

For more information, read Server configuration: clr strict security

Solution

To run the pr_readfromstream UDF, the database must have the trustworthy property set to allow running of the assembly.

Set Trustworthy property to ON in the database mapped to the environment impacted.

References

Java user-defined Functions in your Pega database