diff --git a/Configuration/GlobalAssemblyInfo.cs b/Configuration/GlobalAssemblyInfo.cs
index 911ccc68a..445719d67 100644
--- a/Configuration/GlobalAssemblyInfo.cs
+++ b/Configuration/GlobalAssemblyInfo.cs
@@ -15,7 +15,7 @@ internal static class RevisionClass
 	public const string Major = "3";
 	public const string Minor = "7";
 	public const string Build = "2";
-	public const string Revision = "2821";
+	public const string Revision = "2823";
 
         public const string MainVersion = Major + "." + Minor;
 	public const string FullVersion = Major + "." + Minor + "." + Build + "." + Revision;
diff --git a/Configuration/Version.defs b/Configuration/Version.defs
index c31495089..e1e48041c 100644
--- a/Configuration/Version.defs
+++ b/Configuration/Version.defs
@@ -1,4 +1,4 @@
 %MINOR%=7
-%REVISION%=2821
+%REVISION%=2823
 %COREVERSION%=2
 %MAJOR%=3
diff --git a/Parsers/PascalABCParserNewSaushkin/ABCPascal.cs b/Parsers/PascalABCParserNewSaushkin/ABCPascal.cs
index 4bc24ae6a..8f03a8007 100644
--- a/Parsers/PascalABCParserNewSaushkin/ABCPascal.cs
+++ b/Parsers/PascalABCParserNewSaushkin/ABCPascal.cs
@@ -2,7 +2,7 @@
 //  This CSharp output file generated by Gardens Point LEX
 //  Version:  1.1.3.301
 //  Machine:  DESKTOP-G8V08V4
-//  DateTime: 18.01.2021 18:43:04
+//  DateTime: 22.02.2021 17:50:28
 //  UserName: ?????????
 //  GPLEX input file <ABCPascal.lex>
 //  GPLEX frame file <embedded resource>
diff --git a/Parsers/PascalABCParserNewSaushkin/ABCPascalYacc.cs b/Parsers/PascalABCParserNewSaushkin/ABCPascalYacc.cs
index cfce58470..c40b17890 100644
--- a/Parsers/PascalABCParserNewSaushkin/ABCPascalYacc.cs
+++ b/Parsers/PascalABCParserNewSaushkin/ABCPascalYacc.cs
@@ -2,7 +2,7 @@
 
 // GPPG version 1.3.6
 // Machine:  DESKTOP-G8V08V4
-// DateTime: 18.01.2021 18:43:05
+// DateTime: 22.02.2021 17:50:29
 // UserName: ?????????
 // Input file <D:\PABC_Git\Parsers\PascalABCParserNewSaushkin\ABCPascal.y>
 
diff --git a/Parsers/PascalABCParserNewSaushkin/PABC.ymc b/Parsers/PascalABCParserNewSaushkin/PABC.ymc
index d4b29332a..59adc3c0a 100644
--- a/Parsers/PascalABCParserNewSaushkin/PABC.ymc
+++ b/Parsers/PascalABCParserNewSaushkin/PABC.ymc
@@ -308,5 +308,6 @@ script=
 
 
 
+
 
 
diff --git a/Release/pabcversion.txt b/Release/pabcversion.txt
index 17eb618c7..2ab71146e 100644
--- a/Release/pabcversion.txt
+++ b/Release/pabcversion.txt
@@ -1 +1 @@
-3.7.2.2821
+3.7.2.2823
diff --git a/ReleaseGenerators/PascalABCNET_version.nsh b/ReleaseGenerators/PascalABCNET_version.nsh
index 4f0c54852..48bc84910 100644
--- a/ReleaseGenerators/PascalABCNET_version.nsh
+++ b/ReleaseGenerators/PascalABCNET_version.nsh
@@ -1 +1 @@
-!define VERSION '3.7.2.2821'
+!define VERSION '3.7.2.2823'
diff --git a/SyntaxTree/tree/TreeHelper.cs b/SyntaxTree/tree/TreeHelper.cs
index b375f9c87..daddd8232 100644
--- a/SyntaxTree/tree/TreeHelper.cs
+++ b/SyntaxTree/tree/TreeHelper.cs
@@ -1769,6 +1769,7 @@ namespace PascalABCCompiler.SyntaxTree
 
     public partial class slice_expr
     {
+        public List<System.Tuple<expression, expression, expression>> slices = new List<Tuple<expression, expression, expression>>();
         public override string ToString() => this.v + "[" + this.from + ":" + this.to + ":" + this.step + "]";
     }
     
diff --git a/TestSuite/CompilationSamples/PABCSystem.pas b/TestSuite/CompilationSamples/PABCSystem.pas
index 90601d577..84ea77108 100644
--- a/TestSuite/CompilationSamples/PABCSystem.pas
+++ b/TestSuite/CompilationSamples/PABCSystem.pas
@@ -2773,6 +2773,9 @@ function InternalRange(l,r: real): RealRange;
   
 ///--
 function IsInputPipedOrRedirectedFromFile: boolean;
+
+///--
+function CheckAndCorrectFromToAndCalcCountForSystemSlice(situation: integer; Len: integer; var from, &to: integer; step: integer): integer;
   
 // -----------------------------------------------------
 //                  Internal procedures for PABCRTL.dll
diff --git a/bin/Lib/PABCSystem.pas b/bin/Lib/PABCSystem.pas
index 90601d577..84ea77108 100644
--- a/bin/Lib/PABCSystem.pas
+++ b/bin/Lib/PABCSystem.pas
@@ -2773,6 +2773,9 @@ function InternalRange(l,r: real): RealRange;
   
 ///--
 function IsInputPipedOrRedirectedFromFile: boolean;
+
+///--
+function CheckAndCorrectFromToAndCalcCountForSystemSlice(situation: integer; Len: integer; var from, &to: integer; step: integer): integer;
   
 // -----------------------------------------------------
 //                  Internal procedures for PABCRTL.dll