This issue is fixed in CA PPM 15.4 and also fixed in the following patches (and higher) 15.1 patch 8, 15.2 patch 7, and 15.3 patch 2.
Important: 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 '.'