Press Ctrl + G to open the Immediate Window.
Enter:
? AccessError(2486)
-------Result starts---------
You can't carry out this action at the present time.
You tried to run a macro or used the DoCmd object in Visual Basic to carry
out an action. However, Microsoft Office Access is performing another
activity that prevents this action from being carried out now.
For example, no actions on a form can be carried out while Microsoft Office
Access is repainting a control or calculating an expression.
Carry out the action later.
------Result ends---------
