Hi, We got an error when we used API to see a quota detail, we get the following traceback: 157.99.60.167 - - [08/Mar/2016:10:13:58 +0200] "GET /api/quotas HTTP/1.1" 200 - "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:44.0) Gecko/20100101 Firefox/44.0" galaxy.web.framework.decorators ERROR 2016-03-08 10:14:10,273 Uncaught exception in exposed API method: Traceback (most recent call last): File ".../lib/galaxy/web/framework/decorators.py", line 142, in decorator rval = dumps( rval, indent=4, sort_keys=True ) File ".../lib/galaxy/util/json.py", line 65, in safe_dumps dumped = json.dumps( *args, allow_nan=False, **kwargs ) File "/usr/lib64/python2.6/json/__init__.py", line 237, in dumps **kw).encode(obj) File "/usr/lib64/python2.6/json/encoder.py", line 367, in encode chunks = list(self.iterencode(o)) File "/usr/lib64/python2.6/json/encoder.py", line 309, in _iterencode for chunk in self._iterencode_dict(o, markers): File "/usr/lib64/python2.6/json/encoder.py", line 275, in _iterencode_dict for chunk in self._iterencode(value, markers): File "/usr/lib64/python2.6/json/encoder.py", line 306, in _iterencode for chunk in self._iterencode_list(o, markers): File "/usr/lib64/python2.6/json/encoder.py", line 204, in _iterencode_list for chunk in self._iterencode(value, markers): File "/usr/lib64/python2.6/json/encoder.py", line 309, in _iterencode for chunk in self._iterencode_dict(o, markers): File "/usr/lib64/python2.6/json/encoder.py", line 275, in _iterencode_dict for chunk in self._iterencode(value, markers): File "/usr/lib64/python2.6/json/encoder.py", line 309, in _iterencode for chunk in self._iterencode_dict(o, markers): File "/usr/lib64/python2.6/json/encoder.py", line 275, in _iterencode_dict for chunk in self._iterencode(value, markers): File "/usr/lib64/python2.6/json/encoder.py", line 317, in _iterencode for chunk in self._iterencode_default(o, markers): File "/usr/lib64/python2.6/json/encoder.py", line 323, in _iterencode_default newobj = self.default(o) File "/usr/lib64/python2.6/json/encoder.py", line 344, in default raise TypeError(repr(o) + " is not JSON serializable") TypeError: Decimal('856488698767') is not JSON serializable json can't serialize Decimal object. I tested it with simplejson and it works. An other solution is to convert the Decimal object to a float before the dumps. Thanks a lot for your help Best regards, -- Fabien Mareuil | Centre d'Informatique pour la Biologie fabien.mareuil@pasteur.fr <mailto:fabien.mareuil@pasteur.fr> | Institut Pasteur 25,28 rue du Docteur Roux 75015 Paris, France