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SQL Server error code

SQL Server error 6513

SQL Server raises error 6513 at severity 16, which marks a problem with the query or data that you can correct.

Failed to initialize the Common Language Runtime (CLR) %ls due to memory pressure. This is probably due to memory pressure in the MemToLeave region of memory. For more information, see the CLR integration documentation in SQL Server Books Online.
Msg6513
Severity16
Group6000–6999

Source: Database Engine events and errors