it means that tex is having to over-stretch the white space in order to justify the lines in that paragraph, Do you have large unbreakable "words" such as technical or foreign terms? You could try \sloppy which tells tex to allow more stretch or give tex other help to find good linebreaks
– David CarlisleMar 26 '19 at 20:10
this might be useful: [How to avoid using \sloppy document-wide to fix overfull \hbox problems?]
(https://tex.stackexchange.com/q/59122)
– barbara beetonMar 26 '19 at 20:27
I have this these warnings coming up on abstract where all text comes on one line. My abstract text consists of around 250 words. I do not know after how many words it should split into new line.
– Shah JeeMar 27 '19 at 22:45
\sloppywhich tells tex to allow more stretch or give tex other help to find good linebreaks – David Carlisle Mar 26 '19 at 20:10