diff --git a/GPy/core/symbolic.py b/GPy/core/symbolic.py
index c3e1a52c..24623f91 100644
--- a/GPy/core/symbolic.py
+++ b/GPy/core/symbolic.py
@@ -12,7 +12,7 @@ from sympy.utilities.iterables import numbered_symbols
 import scipy
 import GPy
 #from scipy.special import gammaln, gamma, erf, erfc, erfcx, polygamma
-from GPy.util.symbolic import normcdf, normcdfln, logistic, logisticln, erfcx, erfc, gammaln
+#@NDL you removed this file! #from GPy.util.symbolic import normcdf, normcdfln, logistic, logisticln, erfcx, erfc, gammaln
 def getFromDict(dataDict, mapList):
     return reduce(lambda d, k: d[k], mapList, dataDict)
 
diff --git a/GPy/util/__init__.py b/GPy/util/__init__.py
index 3a9fbdb8..4e42d80a 100644
--- a/GPy/util/__init__.py
+++ b/GPy/util/__init__.py
@@ -25,5 +25,6 @@ try:
 except ImportError as e:
     _sympy_available = False
 
-if _sympy_available:
-    import symbolic
+#@NDL: you deleted the symbolic.py file!
+#if _sympy_available:
+    #import symbolic