From 86bc06c8bb1fc3f00f8b3671f5b6ef7cc6e149c1 Mon Sep 17 00:00:00 2001
From: Alex Kaszynski <akascap@gmail.com>
Date: Thu, 24 Mar 2022 23:53:06 +0100
Subject: [PATCH] check for empty geometry when plotting

---
 src/ansys/mapdl/core/mapdl.py          | 15 ++++++++++++++-
 src/ansys/mapdl/core/mapdl_geometry.py | 20 +++++++++++++-------
 2 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/src/ansys/mapdl/core/mapdl.py b/src/ansys/mapdl/core/mapdl.py
index 010a8cb4e69..f5765aac58f 100644
--- a/src/ansys/mapdl/core/mapdl.py
+++ b/src/ansys/mapdl/core/mapdl.py
@@ -1061,6 +1061,12 @@ def vplot(
 
         if vtk:
             kwargs.setdefault("title", "MAPDL Volume Plot")
+            if not self.geometry.n_volu:
+                warnings.warn(
+                    "Either no volumes have been selected or there is nothing to plot."
+                )
+                return general_plotter([], [], [], **kwargs)
+
             cm_name = "__tmp_area2__"
             self.cm(cm_name, "AREA", mute=True)
             self.aslv("S", mute=True)  # select areas attached to active volumes
@@ -1178,6 +1184,13 @@ def aplot(
             kwargs.setdefault("show_scalar_bar", False)
             kwargs.setdefault("title", "MAPDL Area Plot")
             kwargs.setdefault("scalar_bar_args", {"title": "Scalar Bar Title"})
+
+            if not self.geometry.n_area:
+                warnings.warn(
+                    "Either no areas have been selected or there is nothing to plot."
+                )
+                return general_plotter([], [], [], **kwargs)
+
             if quality > 10:
                 quality = 10
             if quality < 1:
@@ -1367,7 +1380,7 @@ def lplot(
             kwargs.setdefault("title", "MAPDL Line Plot")
             if not self.geometry.n_line:
                 warnings.warn(
-                    "Either no lines have been selected or there " "is nothing to plot"
+                    "Either no lines have been selected or there is nothing to plot."
                 )
                 return general_plotter([], [], [], **kwargs)
 
diff --git a/src/ansys/mapdl/core/mapdl_geometry.py b/src/ansys/mapdl/core/mapdl_geometry.py
index 09c0919d53e..cf9c898cf67 100644
--- a/src/ansys/mapdl/core/mapdl_geometry.py
+++ b/src/ansys/mapdl/core/mapdl_geometry.py
@@ -221,7 +221,8 @@ def areas(self, quality=4, merge=False):
     @supress_logging
     @run_as_prep7
     def generate_surface(self, density=4, amin=None, amax=None, ninc=None):
-        """Generate an all-triangular surface of the active surfaces.
+        """
+        Generate an all-triangular surface of the active surfaces.
 
         Parameters
         ----------
@@ -325,7 +326,8 @@ def generate_surface(self, density=4, amin=None, amax=None, ninc=None):
 
     @property
     def n_volu(self):
-        """Number of volumes currently selected
+        """
+        Number of volumes currently selected.
 
         Examples
         --------
@@ -336,7 +338,8 @@ def n_volu(self):
 
     @property
     def n_area(self):
-        """Number of areas currently selected
+        """
+        Number of areas currently selected.
 
         Examples
         --------
@@ -347,7 +350,8 @@ def n_area(self):
 
     @property
     def n_line(self):
-        """Number of lines currently selected
+        """
+        Number of lines currently selected.
 
         Examples
         --------
@@ -358,7 +362,8 @@ def n_line(self):
 
     @property
     def n_keypoint(self):
-        """Number of keypoints currently selected
+        """
+        Number of keypoints currently selected.
 
         Examples
         --------
@@ -369,12 +374,13 @@ def n_keypoint(self):
 
     @supress_logging
     def _item_count(self, entity):
-        """Return item count for a given entity"""
+        """Return item count for a given entity."""
         return int(self._mapdl.get(entity=entity, item1="COUNT"))
 
     @property
     def knum(self):
-        """Array of keypoint numbers.
+        """
+        Array of keypoint numbers.
 
         Examples
         --------