Added additional Pollination version check

LadybugTools_Engine/Compute/InstallPythonEnv_LBT.cs

@@ -39,9 +39,11 @@ public static PythonEnvironment InstallPythonEnv_LBT(bool run = false, bool rein
         {
             // check if referenced Python is installed
             string referencedExecutable = @"C:\Program Files\ladybug_tools\python\python.exe";
-            if (!File.Exists(referencedExecutable))
+
+            // NOTE - The version number below relates to the ProductVersion field of the "C:\Program Files\ladybug_tools\uninstall.exe" file, and doesn't necessarily reflect the version of the installer/uninstaller
+            // Pollination 1.35.14 has an uninstaller ProductVersion of 1.38.104
+            if (!Query.IsPollinationInstalled(targetPollinationVersion: "1.38.104", includeBuildNumber: false))
             {
-                Base.Compute.RecordError($"Could not find referenced python executable at {referencedExecutable}. Please install Pollination try again.");
                 return null;
             }
 

LadybugTools_Engine/Query/IsPollinationInstalled.cs

@@ -0,0 +1,78 @@
+/*
+ * This file is part of the Buildings and Habitats object Model (BHoM)
+ * Copyright (c) 2015 - 2023, the respective contributors. All rights reserved.
+ *
+ * Each contributor holds copyright over their respective contributions.
+ * The project versioning (Git) records all such contribution source information.
+ *
+ *
+ * The BHoM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3.0 of the License, or
+ * (at your option) any later version.
+ *
+ * The BHoM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this code. If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
+ */
+
+using BH.oM.Base.Attributes;
+using BH.oM.LadybugTools;
+using System.Linq;
+using System.Collections.Generic;
+using System.ComponentModel;
+using BH.oM.Python;
+using System.IO;
+using System;
+using System.Diagnostics;
+
+namespace BH.Engine.LadybugTools
+{
+    public static partial class Query
+    {
+        [Description("Return True if Pollination is installed to the currently supported version.")]
+        [Input("targetPollinationVersion", "The target Pollination build BHoM currently supports.")]
+        [Input("includeBuildNumber", "If true, the build number will be included in the comparison.")]
+        [Output("bool", "True if Pollination is installed to the currently supported version.")]
+        public static bool IsPollinationInstalled(string targetPollinationVersion, bool includeBuildNumber)
+        {
+            // check if referenced Python is installed
+            string referencedExecutable = @"C:\Program Files\ladybug_tools\python\python.exe";
+            if (!File.Exists(referencedExecutable))
+            {
+                Base.Compute.RecordError($"Could not find referenced python executable at {referencedExecutable}. Please install Pollination version {targetPollinationVersion} and try again.");
+                return false;
+            }
+
+            // obtain version of pollination installed
+            string referencedUninstaller = @"C:\Program Files\ladybug_tools\uninstall.exe";
+            FileVersionInfo versionInfo = FileVersionInfo.GetVersionInfo(referencedUninstaller);
+            if (includeBuildNumber)
+            {
+                if (versionInfo.ProductVersion != targetPollinationVersion)
+                {
+                    Base.Compute.RecordError($"Polination version installed ({versionInfo.ProductVersion}) is not the same as the version required for this code to function correctly ({targetPollinationVersion}).");
+                    return false;
+                }
+            }
+
+            // check that version matches the target version
+            int major = int.Parse(targetPollinationVersion.Split('.')[0]);
+            int minor = int.Parse(targetPollinationVersion.Split('.')[1]);
+            if (versionInfo.ProductMajorPart != major || versionInfo.ProductMinorPart != minor)
+            {
+                if (versionInfo.ProductVersion != targetPollinationVersion)
+                {
+                    Base.Compute.RecordError($"Pollination version installed ({versionInfo.ProductVersion}) is not the same as the version required for this code to function correctly ({targetPollinationVersion}).");
+                    return false;
+                }
+            }
+
+            return true;
+        }
+    }
+}