diff --git a/tofu/imas2tofu/__init__.py b/tofu/imas2tofu/__init__.py
index 184fc8773..842ecaef4 100644
--- a/tofu/imas2tofu/__init__.py
+++ b/tofu/imas2tofu/__init__.py
@@ -6,13 +6,13 @@
 """
 import warnings
 import traceback
+import itertools as itt
 
 try:
     try:
         from tofu.imas2tofu._core import *
     except Exception:
         from ._core import *
-    del warnings, traceback
 except Exception as err:
     if str(err) == 'imas not available':
         msg = ""
@@ -26,5 +26,72 @@
         msg += "\n\n    => the optional sub-package tofu.imas2tofu is not usable\n"
     raise Exception(msg)
 
+
+# -----------------------------------------------
+#   Check IMAS version vs latest available in linux modules
+# -----------------------------------------------
+
+_KEYSTR = 'IMAS/'
+
+
+# extract all IMAS versions from a str returned by modules
+def extractIMAS(ss, keystr=_KEYSTR):
+    if keystr not in ss:
+        raise Exception
+    ls = ss[ss.index(keystr):].split('\n')
+    ls = itt.chain.from_iterable([s.split(' ') for s in ls])
+    ls = [s for s in ls if keystr in s]
+    ls = [s[len(keystr):s.index('(')] if '(' in s else s[len(keystr):]
+          for s in ls]
+    return sorted(ls)
+
+
+# Compare current and latest available IMAS versions
+def check_IMAS_version(verb=True, keystr=_KEYSTR):
+    import subprocess
+
+    # Get currently loaded IMAS
+    cmd = "module list"
+    proc = subprocess.run(cmd, check=True, shell=True,
+                          stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    lcur = extractIMAS(proc.stdout.decode(), keystr=keystr)
+    if len(lcur) != 1:
+        msg = ("You seem to have no / several IMAS version loaded:\n"
+               + "\t- module list: {}".format(lcur))
+        raise Exception(msg)
+
+    # Get all available IMAS
+    cmd = "module av IMAS"
+    proc = subprocess.run(cmd, check=True, shell=True,
+                          stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    lav = extractIMAS(proc.stdout.decode(), keystr=keystr)
+    if len(lav) == 0:
+        msg = "There is not available IMAS version"
+        raise Exception(msg)
+
+    # Compare and warn
+    if lcur[0] not in lav:
+        msg = "The current IMAS version is not available!"
+        raise Exception(msg)
+
+    msg = None
+    if lav.index(lcur[0]) != len(lav)-1:
+        msg = ("\nYou do not seem to be using the latest IMAS version:\n"
+               + "'module list' vs 'module av IMAS' suggests:\n"
+               + "\t- Current version: {}\n".format(lcur[0])
+               + "\t- Latest version : {}".format(lav[-1]))
+        warnings.warn(msg)
+    return lcur[0], lav
+
+
+# Try comparing and warning
+try:
+    _, _ = check_IMAS_version(verb=True)
+except Exception as err:
+    # This warning is an optional luxury, should not block anything
+    pass
+
+
 __all__ = ['MultiIDSLoader', 'load_Config', 'load_Plasma2D',
            'load_Cam', 'load_Data']
+del warnings, traceback, itt, _KEYSTR
diff --git a/tofu/version.py b/tofu/version.py
index 382360f86..53c102bb6 100644
--- a/tofu/version.py
+++ b/tofu/version.py
@@ -1,2 +1,2 @@
 # Do not edit, pipeline versioning governed by git tags!
-__version__ = '1.4.2a3-1-g88f9524'
+__version__ = '1.4.2a3-2-gfaeb7af'