diff --git a/pyvnt/Reference/error_classes.py b/pyvnt/Reference/error_classes.py
index 5db3495..62dd668 100755
--- a/pyvnt/Reference/error_classes.py
+++ b/pyvnt/Reference/error_classes.py
@@ -106,4 +106,11 @@ def __init__(self, length: int):
     def __str__(self):
         return f"Length of values should be 7. Length of given list is {self.length}"
 
+class VersionError(Exception):
+    def __init__(self, version: str):
+        self.version = version
+
+    def __str__(self):
+        return f"Version {self.version} does not match supported version"
+
 
diff --git a/pyvnt/utils/check_deps.py b/pyvnt/utils/check_deps.py
new file mode 100644
index 0000000..9ad315d
--- /dev/null
+++ b/pyvnt/utils/check_deps.py
@@ -0,0 +1,24 @@
+import subprocess, re
+from pyvnt.Reference.error_classes import VersionError
+'''
+This function checks for the existence of an external software package. 
+'''
+
+def check_package(name, version): 
+
+    pkg_cmd = ""
+    if name == "OpenFOAM":
+        pkg_cmd = "blockMesh"
+
+        try:   
+            res = subprocess.check_output([pkg_cmd, "-help"], text=True, shell=True)
+            
+            match = re.search(r"OpenFOAM-(\d+)", res)
+
+            v = match.group(1)
+
+            if v != version:
+                raise VersionError(v)
+        except Exception as e:
+            print(e)
+            print("OpenFOAM might not be installed or its environment might not be active")
\ No newline at end of file