Hello, 

I have a problem while installing the "product comparison" module: i have this error message. I have a debian server with odoo v.12.0

Thank you for your help, 

Antoine

Erreur:
Odoo Server Error

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/models.py", line 1108, in _validate_fields
check(self)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 345, in _check_xml
view_def = view.read_combined(['arch'])
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 794, in read_combined
arch = self.apply_view_inheritance(arch_tree, root.id, self.model)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 742, in apply_view_inheritance
source = self.apply_inheritance_specs(source, specs_tree, view_id)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 720, in apply_inheritance_specs
self.raise_view_error(_("Element '%s' cannot be located in parent view") % tag, inherit_id)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 548, in raise_view_error
raise ValueError(message)
ValueError: L'élément '<xpath expr="//hr[@id='hr_product_attributes_simple']">' ne peut être localisé dans la vue parente

Contexte de l'erreur :
Vue `Product attributes table`
[view_id: 2986, xml_id: n/a, model: n/a, parent_id: 1499]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 758, in parse
self._tags[rec.tag](rec, de, mode=mode)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 736, in _tag_template
return self._tag_record(record, data_node)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 663, in _tag_record
record = model.with_context(rec_context)._load_records([data], self.mode == 'update')
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3868, in _load_records
records = self._load_records_create([data['values'] for data in to_create])
File "/usr/lib/python3/dist-packages/odoo/addons/website/models/ir_ui_view.py", line 138, in _load_records_create
'inherit_id': specific_parent_view.id,
File "/usr/lib/python3/dist-packages/odoo/addons/website/models/ir_ui_view.py", line 73, in write
website_specific_view = view.copy(copy_vals)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 459, in copy
return super(View, self).copy(default)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 4296, in copy
new = self.with_context(lang=None).create(vals)
File "<decorator-gen-32>", line 2, in create
File "/usr/lib/python3/dist-packages/odoo/api.py", line 461, in _model_create_multi
return create(self, [arg])
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 428, in create
return super(View, self).create(vals_list)
File "<decorator-gen-3>", line 2, in create
File "/usr/lib/python3/dist-packages/odoo/api.py", line 462, in _model_create_multi
return create(self, arg)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3563, in create
records = self._create(data_list)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3695, in _create
records._validate_fields(name for data in data_list for name in data['stored'])
File "/usr/lib/python3/dist-packages/odoo/models.py", line 1112, in _validate_fields
raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))
odoo.exceptions.ValidationError: ('Erreur lors de la validation de la contrainte\n\nL\'élément \'<xpath expr="//hr[@id=\'hr_product_attributes_simple\']">\' ne peut être localisé dans la vue parente\n\nContexte de l\'erreur :\nVue `Product attributes table`\n[view_id: 2986, xml_id: n/a, model: n/a, parent_id: 1499]', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/http.py", line 656, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 314, in _handle_exception
raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 87, in reraise
raise value
File "/usr/lib/python3/dist-packages/odoo/http.py", line 698, in dispatch
result = self._call_function(**self.params)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 346, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 97, in wrapper
return f(dbname, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 339, in checked_call
result = self.endpoint(*a, **kw)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 941, in __call__
return self.method(*args, **kw)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 519, in response_wrap
response = f(*args, **kw)
File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 966, in call_button
action = self._call_kw(model, method, args, {})
File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 954, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/usr/lib/python3/dist-packages/odoo/api.py", line 759, in call_kw
return _call_kw_multi(method, model, args, kwargs)
File "/usr/lib/python3/dist-packages/odoo/api.py", line 746, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "<decorator-gen-61>", line 2, in button_immediate_install
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 74, in check_and_log
return method(self, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 445, in button_immediate_install
return self._button_immediate_function(type(self).button_install)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 561, in _button_immediate_function
modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 86, in new
odoo.modules.load_modules(registry._db, force_demo, status, update_module)
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 421, in load_modules
loaded_modules, update_module, models_to_check)
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 313, in load_marked_modules
perform_checks=perform_checks, models_to_check=models_to_check
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 222, in load_module_graph
load_data(cr, idref, mode, kind='data', package=package, report=report)
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 68, in load_data
tools.convert_file(cr, package.name, filename, idref, mode, noupdate, kind, report)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 802, in convert_file
convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 865, in convert_xml_import
obj.parse(doc.getroot(), mode=mode)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 764, in parse
exc_info[2]
File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 86, in reraise
raise value.with_traceback(tb)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 758, in parse
self._tags[rec.tag](rec, de, mode=mode)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 736, in _tag_template
return self._tag_record(record, data_node)
File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 663, in _tag_record
record = model.with_context(rec_context)._load_records([data], self.mode == 'update')
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3868, in _load_records
records = self._load_records_create([data['values'] for data in to_create])
File "/usr/lib/python3/dist-packages/odoo/addons/website/models/ir_ui_view.py", line 138, in _load_records_create
'inherit_id': specific_parent_view.id,
File "/usr/lib/python3/dist-packages/odoo/addons/website/models/ir_ui_view.py", line 73, in write
website_specific_view = view.copy(copy_vals)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 459, in copy
return super(View, self).copy(default)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 4296, in copy
new = self.with_context(lang=None).create(vals)
File "<decorator-gen-32>", line 2, in create
File "/usr/lib/python3/dist-packages/odoo/api.py", line 461, in _model_create_multi
return create(self, [arg])
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_ui_view.py", line 428, in create
return super(View, self).create(vals_list)
File "<decorator-gen-3>", line 2, in create
File "/usr/lib/python3/dist-packages/odoo/api.py", line 462, in _model_create_multi
return create(self, arg)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3563, in create
records = self._create(data_list)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3695, in _create
records._validate_fields(name for data in data_list for name in data['stored'])
File "/usr/lib/python3/dist-packages/odoo/models.py", line 1112, in _validate_fields
raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))
odoo.tools.convert.ParseError: "Erreur lors de la validation de la contrainte

L'élément '<xpath expr="//hr[@id='hr_product_attributes_simple']">' ne peut être localisé dans la vue parente

Contexte de l'erreur :
Vue `Product attributes table`
[view_id: 2986, xml_id: n/a, model: n/a, parent_id: 1499]
None" while parsing None:28, near
<data inherit_id="website_sale.product" customize_show="True" active="True" name="Product attributes table">
<xpath expr="//hr[@id='hr_product_attributes_simple']" position="replace"/>
<xpath expr="//p[@id='product_attributes_simple']" position="replace"/>
<xpath expr="//div[@id='product_full_description']" position="after">
<section class="container" id="product_full_spec">
<t t-set="atts" t-value="product.get_variant_groups()"/>
<t t-if="len(atts)">
<h3 class="text-center mb32">Specifications for <t t-esc="product.name"/></h3>
<div class="row">
<div class="col-lg-8 offset-lg-2" id="product_specifications">
<table class="table table-striped table-sm table-hover">
<t t-foreach="atts.keys()" t-as="spec">
<t t-if="len(atts.keys())>1">
<tr class="clickable" data-toggle="collapse" t-att-data-target="'.'+spec.split()[0]">
<th class="text-left" t-att-colspan="2"><t t-esc="spec"/></th>
</tr>
</t>
<tr t-foreach="atts[spec]" t-as="att" t-att-class="'collapse in show ' + spec.split()[0]">
<td t-esc="att.attribute_id.name"/>
<td>
<t t-set="or_separator">or</t>
<t t-esc="(' %s ' % or_separator).join(att.value_ids.mapped('name'))"/>
</td>
</tr>
</t>
</table>
</div>
</div>
</t>
</section>
</xpath>
</data>