Fix issue #17377

When the 2nd line of each timestep block contains a title, it is searched for a time keyword.
If not found, no timestep value was added to the list of timesteps, making it crash when setting
the TIME_STEPS() key

Domains/Chemistry/vtkXYZMolReader2.cxx

@@ -114,6 +114,10 @@ int vtkXYZMolReader2::RequestInformation(
         tmp >> timeValue;
         this->TimeSteps.push_back(timeValue);
       }
+      else
+      {
+        this->TimeSteps.push_back(this->NumberOfTimeSteps);
+      }
     }
     else
     {