Traceback (most recent call last):
File "/opt/FreeCAD/Mod/Fem/femguiobjects/_ViewProviderFemMaterial.py", line 261, in accept
if checkunits(self.material) is True:
File "/opt/FreeCAD/Mod/Material/materialtools/cardutils.py", line 609, in check_mat_units
known_quantities = get_known_material_quantity_parameter()
File "/opt/FreeCAD/Mod/Material/materialtools/cardutils.py", line 330, in get_known_material_quantity_parameter
template_data = get_material_template()
File "/opt/FreeCAD/Mod/Material/materialtools/cardutils.py", line 224, in get_material_template
import yaml
<type 'exceptions.ImportError'>: No module named yaml
Custom material directory set by user: does not exist.
Running the Python command 'FEM_MaterialEditor' failed:
Traceback (most recent call last):
File "/opt/FreeCAD/Mod/Fem/femcommands/commands.py", line 573, in Activated
FreeCADGui.doCommand("MaterialEditor.openEditor()")
File "<string>", line 1, in <module>
File "/opt/FreeCAD/Mod/Material/MaterialEditor.py", line 666, in openEditor
editor = MaterialEditor(obj, prop)
File "/opt/FreeCAD/Mod/Material/MaterialEditor.py", line 103, in __init__
self.implementModel()
File "/opt/FreeCAD/Mod/Material/MaterialEditor.py", line 139, in implementModel
template_data = get_material_template(True)
File "/opt/FreeCAD/Mod/Material/materialtools/cardutils.py", line 224, in get_material_template
import yaml
No module named yaml