Datum Reference String Has Syntax Errors
This message indicates that one or more of the datum reference strings for the geometric tolerance has syntax errors.
You can fix this problem in one of the following ways:
Using GD&T Advisor functionality…
1. Right-click on the feature icon in the Feature Tree that the geometric tolerance is associated with and select Edit from the context menu
2. On the Edit Feature dashboard, select a datum reference frame for the geometric tolerance
3. Select 
in the dashboard to accept the changes
in the dashboard to accept the changesUsing Creo Parametric functionality …
1. Click on the geometric tolerance in the Creo graphics area
2. On the Geometric Tolerance dashboard, enter a valid combination of datum reference strings
3. On the GD&T Advisor dashboard, click on Update to update the GD&T Advisor model