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Has anyone received this error on a Case before? I think it has something to do with
There is already an open DataReader associated with this Command which must be closed first.
Haven't seen that one before. What's the context?
DataReader intended for reading from database. As usually it groups few reading/updating operations simultaneously.
Suppose that in Acumatica is some code like this:
1. read information about customers
2. read information about sales orders
3. read information about sales orders details
4. read information about customers details
5. read information about BAccount.
and suppose that reading of each points takes 3 seconds or 15 seconds in total. Then if after 6-th second you or somebody or something else initiated another action then he or you will see error message which you've got. There are ways to solve it technically, but additional details can be needed.
Sorry for the false alarm here. It seems to be related to a customization. My bad, I should have thought of that first.