Target Word Count: Calculating by line not working

Hi,

We would like to use Target Word Count for calculating the lines in the target version for certain file types.

Calculating by word works fine, but if we tick the "Calculate by line" box, only the segments are counted; no characters and consequently no lines show up in the report. It doesn't matter if we fill the box for "Characters per line" or tick "Include spaces".

Can anyone help?