sendMessage() not working in python and R client

>>> syn.sendMessage(["3360851"], "test", "test")

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/client.py", line 3284, in sendMessage

fileHandleId = multipart_upload_string(self, messageBody, contentType)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/multipart_upload.py", line 263, in multipart_upload_string

**kwargs)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/multipart_upload.py", line 341, in _multipart_upload

storageLocationId=storageLocationId, **kwargs)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/multipart_upload.py", line 117, in _start_multipart_upload

endpoint=syn.fileHandleEndpoint))

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/client.py", line 3346, in restPOST

exceptions._raise_for_status(response, verbose=self.debug)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/exceptions.py", line 153, in _raise_for_status

raise SynapseHTTPError(message, response=response)

synapseclient.exceptions.SynapseHTTPError: 400 Client Error:

Invalid Name: 'text/plain'. Names may only contain: letters, numbers, spaces, underscores, hypens, periods, plus signs, and parentheses

>>> syn.sendMessage(["3360851], "test", "test")

File "<stdin>", line 1

syn.sendMessage(["3360851], "test", "test")

^

SyntaxError: invalid syntax

>>> syn.sendMessage([3360851], "test", "test")

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/client.py", line 3284, in sendMessage

fileHandleId = multipart_upload_string(self, messageBody, contentType)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/multipart_upload.py", line 263, in multipart_upload_string

**kwargs)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/multipart_upload.py", line 341, in _multipart_upload

storageLocationId=storageLocationId, **kwargs)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/multipart_upload.py", line 117, in _start_multipart_upload

endpoint=syn.fileHandleEndpoint))

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/client.py", line 3346, in restPOST

exceptions._raise_for_status(response, verbose=self.debug)

File "/home/aelamb/anaconda3/envs/py36/lib/python3.6/site-packages/synapseclient/exceptions.py", line 153, in _raise_for_status

raise SynapseHTTPError(message, response=response)

synapseclient.exceptions.SynapseHTTPError: 400 Client Error:

Invalid Name: 'text/plain'. Names may only contain: letters, numbers, spaces, underscores, hypens, periods, plus signs, and parentheses