I’ve created a new format code: #,##" dl"
It works as expected when used with integers or formulas: “14” becomes “14 dl” and “=15/2” becomes “7,5 dl”.
The problem arises when I type a decimal value into the box. Like “1,5”. The expected result is “1,5 dl”, but what I get is “###”.
Why is that?
‘###’ normally indicates that the column is not wide enough to display the contents; try widening the column and see what happens. You may find an error code.
Facepalm… lots of agitation over a simple mistake.
Thanks.
‘###’ normally indicates that the column is not wide enough to display the contents; try widening the column and see what happens. You may find an error code.
Posted as an answer to help others with the same problem.
If this answer helped you, please accept it by clicking the check mark 
to the left and, karma permitting, upvote it. That will help other people with the same question.