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Error message "object reference not set to an instance of an object"

Tuned Listener
Posts: 24
Country: USA

Error message "object reference not set to an instance of an object"

Does anyone have a solution for the following? 

 

After opening a different database and then returning to the previous database I get the error message "Object reference not set to an instance of an object" when scheduling/clearing activities.  If I close the database and reopen it is fine.

 

I am using ACT 10.0.2.191, Hotfix 1 on Windows XP SP3

Platinum Elite Contributor
Posts: 14,384
Country: Australia

Re: Error message "object reference not set to an instance of an object"

This is usually a corrupt activity.

 

Was the database imported from an ACT! 6.0 or earlier database?

 

Does it happen in other databases (eg the demo)?