Per accident I run into this problem with the latex2e update 2015
test files:

\documentclass[]{article}
\usepackage{pgffor}
\foreach\x in {1,...,98} %
{\newcount\a}

\usepackage{datatool}
\DTLloaddb{test}{test.csv}

\begin{document}
blub
\end{document}

test.csv contains only two lines:

test
blub


When I compile this the compilations stops and asks for input

\@dtl@line=

and I have to kill it with ctrl+Z. 

I have this problems for all numbers in the foreach loop from 98 to
104, other numbers works fine (in the actual document the counts
were allocated by packages). 

The last number for a count (with 104 in the loop) is \a=\count197. 

There is no problem with the normal latex.



-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/