From Developing for Dynamics GP comes information that Dexterity DSCCS 2010 RTM should not be used. This only affects developers so don’t freak out and the fix is simple, roll back to a previous Dexterity version like v10 sp4. Make sure to check out the detailed post if you think this affects you. The issue will be fixed in GP 2010 SP 1.
Dexterity DSCCS 2010 RTM should not be used
Development & IntegrationGP 2010GP 10
Archived post from 2010. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.