diff --git a/src/GEOM_SWIG/geompyDC.py b/src/GEOM_SWIG/geompyDC.py
index ea4bcb9d9..4114786cf 100644
--- a/src/GEOM_SWIG/geompyDC.py
+++ b/src/GEOM_SWIG/geompyDC.py
@@ -2375,7 +2375,7 @@ class geompyDC(GEOM._objref_GEOM_Gen):
         #  Example: see GEOM_Spanner.py
         def CheckCompoundOfBlocks(self,theCompound):
             (IsValid, BCErrors) = self.BlocksOp.CheckCompoundOfBlocks(theCompound)
-            RaiseIfFailed("CheckCompoundOfBlocks", self.MeasuOp)
+            RaiseIfFailed("CheckCompoundOfBlocks", self.BlocksOp)
             if IsValid == 0:
                 Descr = self.BlocksOp.PrintBCErrors(theCompound, BCErrors)
                 print Descr