In short: Two tables, one with serialnumbers from 0 through 100
The other with ONLY selected numbers from this range from 0-100.

I added the info from the second table into the first (in a new column) with
'VLOOKUP' ("=VLOOKUP(A100,Sheet2!A:D,3,FALSE)")
All serialnumbers which weren't in the first table, now, obviously, feature
a "#N/A" (No value available) 'marker' or 'sign' or text.
Before and after formatting this column to TEXT (after copying the whole
sheet to a new sheet and pasting 'VALUES' only), following function refuses
to work:

"=IF(J2="#N/A","",IF(J2="BT","BT",""))"

The outcome is "#N/A" instead of " " when the inputfield shows "#N/A"

There is ONE way in which I CAN get it to function, and that's by copying
the "#N/A" from J2 and pasting it into the formula, but I have to do this for
EVERY of the 36000 rows.....(No way José.....), because copying this function
down, doesn't make it work for any following #N/A's

So even though I converted it to TEXT, there is still som row-dependent
information lurking in the back which messes up my function?????

Any thoughts?