diff --git a/src/Core/CSMic.Core.csproj b/src/Core/CSMic.Core.csproj
index 7ee23ad..99f82be 100644
--- a/src/Core/CSMic.Core.csproj
+++ b/src/Core/CSMic.Core.csproj
@@ -7,10 +7,11 @@
 		<Nullable>enable</Nullable>
 		<GeneratePackageOnBuild>False</GeneratePackageOnBuild>
 		<AssemblyName>CSMic.Core</AssemblyName>
-		<Version>2.0.2</Version>
+		<Version>2.1.0</Version>
 		<PackageId>CSMic</PackageId>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
 		<LangVersion>latest</LangVersion>
+		<GenerateDocumentationFile>True</GenerateDocumentationFile>
 	</PropertyGroup>
 
 	<ItemGroup>
diff --git a/src/Core/InputInterpreter.cs b/src/Core/InputInterpreter.cs
index 448862a..e9ebc6b 100644
--- a/src/Core/InputInterpreter.cs
+++ b/src/Core/InputInterpreter.cs
@@ -313,7 +313,7 @@ namespace CSMic
                 if (parser.errors.count > 0)
                 {
                     // Soft error: set numeric to 0 and report a parse error message
-                    ProduceOutput(0m, parser.errors.errMsgFormat);
+                    ProduceOutput(0m, Interpreter.Errors.errMsgFormat);
                 }
                 else
                 {
diff --git a/src/Core/cocor/Parser.frame b/src/Core/cocor/Parser.frame
index 6878147..dcd8d3f 100644
--- a/src/Core/cocor/Parser.frame
+++ b/src/Core/cocor/Parser.frame
@@ -118,8 +118,8 @@ public class Parser {
 
 public class Errors {
 	public int count = 0;                                    // number of errors detected
-	public System.IO.TextWriter errorStream = Console.Out;   // error messages go to this stream
-	public string errMsgFormat = "-- line {0} col {1}: {2}"; // 0=line, 1=column, 2=text
+	public static System.IO.TextWriter errorStream = Console.Error;   // error messages go to this stream
+	public static string errMsgFormat = "-- line {0} col {1}: {2}"; // 0=line, 1=column, 2=text
 
 	public virtual void SynErr (int line, int col, int n) {
 		string s;
diff --git a/src/StandardLibrary/CSMic.StandardLibrary.csproj b/src/StandardLibrary/CSMic.StandardLibrary.csproj
index c415e6a..cc1970b 100644
--- a/src/StandardLibrary/CSMic.StandardLibrary.csproj
+++ b/src/StandardLibrary/CSMic.StandardLibrary.csproj
@@ -6,10 +6,11 @@
 		<AssemblyName>CSMic.StandardLibrary</AssemblyName>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		<Version>2.1.0</Version>
+		<Version>2.1.1</Version>
 		<PackageId>CSMic.StandardLibrary</PackageId>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
 		<LangVersion>latest</LangVersion>
+		<GenerateDocumentationFile>True</GenerateDocumentationFile>
 	</PropertyGroup>
 
 	<ItemGroup>