Excel formula: countifs and criteria "not blank"

My file is structured in columns, and I use my COUNTIFS to make an initial distinction based on the type of objects (in rows).
For example, for the object "ream of paper" (sub-category = A4 format, A3, etc.), the first criterion will be the name of the object, which will sort and select the relevant rows.
The second criterion, on the other hand, helps me select from what has already been filtered, whether there has been a second delivery or not, and thus tells me the number of formats that were delivered in the last delivery.
However, not everything is reordered at the same time, and therefore some cells are filled or not.
The second criterion thus selects formats that were delivered once but have not been reordered a second time.

In brief:
rows = objects (column A) + sub-categories (column B)
columns = 1st (column C), 2nd (column D), ... delivery
objective = count the number of sub-categories that have been delivered once (cells in column C filled), and which have not been delivered a second time (cells in column D empty).

I apologize for explaining this in text, but privacy options do not allow me to share the file.

The quotation marks are inverted in some formulas? I was unaware... Which ones are affected?

Otherwise, try using the criterion NOT(ISBLANK()) - or rather ISBLANK() in the case that concerns you.

What is your complete formula? How is your data structured?

Remember remember the fifth of November
Gunpowder, treason and plot.
I see no reason why gunpowder, treason
Should ever be forgot...

Subject resolved, apparently it’s the function that does not allow to perform a logical test. However, that’s what I was asking for.

it works with "<> " "<>space"