For 15.1, this issue is fixed in 15.1 patch 8. For all other impacted releases, this issue is still under investigation.
Note: Once this issue is fixed, the latest supported Microsoft Project update must also be installed in order to reflect the fix, as a related MSP defect was fixed in the Microsoft Project July 2017 update (MSP2013: KB3213538 and MSP2016: KB3203476).
Change the OS level setting of 'Decimal symbol from comma ',' to period '.'
Steps to implement the workaround:
- Go to Control Panel->Region->
- Click the 'Additional Settings' button
- Change Decimal symbol value to '.'