I have a model which uses a table of SUMPRODUCT forumlae to feed a series of graphs. i've discovered the nasty way that deleting the original data before inserting new data (rather than 'clearing contents' or over-writing) causes every SUMPRODUCT function to return an #N/A error (and hence clearing all graphs and tables feeding off this)
It's too late to UNDO - how can I get the functions to look up on a new batch of data, or am I going to have to completely rebuild the model?
=SUMPRODUCT((Data!$F$4:$F$5000=$R4)*(Data!$K$4:$K$5000=S$3)) is the format i'm using.
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