Group Policy Preferences Drive Mapping error 0x80070035 or 0x80070043

Using group policy preferences to map network fails on workstations with error:
The user ‘%DRIVE_LETTER%’ preference item in the ‘%GROUP_POLICY_NAME% %GUID%’ Group Policy object did not apply because it failed with error code ‘0x80070035 The network path was not found.’ This error was suppressed.



or

The user ‘%DRIVE_LETTER%’ preference item in the ‘%GROUP_POLICY_NAME% %GUID%’ Group Policy object did not apply because it failed with error code ‘0x80070043 The network name cannot be found.’ This error was suppressed.



After double checking the path in the group policy in question, it turns out that the group policy preferences drive mapping doesn’t work if you put a trailing slash on the end of the path.  EG:
\\dc2010\qldfinance\ doesn’t work



however

\\dc2010\qldfinance does.