fix reset cache without pyvista (#1153)

* fix reset cache without pyvista

* fix formatting

Author: koubaa

src/ansys/mapdl/core/mapdl.py

@@ -182,6 +182,7 @@ def __init__(
         self._ignore_errors = False
         self._print_com = print_com  # print the command /COM input.
         self._cached_routine = None
+        self._geometry = None
 
         # Setting up loggers
         self._log = logger.add_instance_logger(
@@ -619,10 +620,11 @@ def geometry(self):
         >>> mapdl.geometry.line_select([3, 4, 5], sel_type='R')
 
         """
+        if self._geometry == None:
+            self._geometry = self._create_geometry()
         return self._geometry
 
-    @property
-    def _geometry(self):  # pragma: no cover
+    def _create_geometry(self):  # pragma: no cover
         """Return geometry cache"""
         from ansys.mapdl.core.mapdl_geometry import Geometry
 

src/ansys/mapdl/core/mapdl_grpc.py

@@ -670,7 +670,7 @@ def _reset_cache(self):
         if self._mesh_rep is not None:
             self._mesh_rep._reset_cache()
 
-        if self.geometry is not None:
+        if self._geometry is not None:
             self._geometry._reset_cache()
 
     @property