Update a Schedule A form Schedule B

This is such a frequent requirement as some contractors keep different versions with different strategies, same as you. So common that in Spider Project it can be performed at a single click of the mouse by clicking on Import Performance from Other Project.

Just kook for similar functionality within your software.

Anything else than a single click of the mouse for something so frequent I would consider a nuisance.

 Note that: import of performance data is executed with the following peculiarities:

• If source project version (from which performance data is imported) has resource assignments, initially absent in destination project version (to which performance data is imported) – these assignments would be automatically added to destination project version.

• Performance data cannot be imported for resources, initially absent in destination project version.

• If source project version has activities, initially absent in destination project version, these activities will be automatically added to newly created phase ‘Unscheduled activities’ (with Code ‘$$$’) in all work breakdown structures of destination project version. Links of these activities will not be imported

Actually, I'm asking about a single click like this in Primavera P6.

Beware of the following trap/BUG.

http://www.planningplanet.com/forums/primavera-version-pm5-pm6/516594/duplicate-resources-after-xer-import

http://www.acceleratedpm.com/articles/problems-importing-primavera-p6-projects