# Bug Tracker

ID 78 Closed (Fixed) datatool 2.22 \DTLifSubString fails inside \DTLforeach

## Report

An error occurs when \DTLifSubString is used inside \DTLforeach. Error message:
Runaway argument?
\expandafter \dtl@ifsingle \expandafter {\dtl@first }{\expandafter \@dtl@testif
substring \ETC.
! Paragraph ended before \dtl@getfirst was complete.
\par
l.19


Nicola Talbot

### MWE

\documentclass{article}

\usepackage{datatool}

\begin{filecontents*}{xx.csv}
2014.02.26
2014.11.12.tm
mm
\end{filecontents*}

\begin{document}

\DTLforeach*{newbDB}{\RowID=RowID}%
{%
\DTLifSubString{2014.02.26,26,2014.11.12.tm}{\RowID}{}{}%
}%

\end{document}


## Evaluation

It turns out this error isn't connected to \DTLforeach and can be reproduced with a far simpler example:
\documentclass{article}

\usepackage{datatool}

\begin{document}

\DTLifSubString{m}{mm}{TRUE}{FALSE}

\end{document}

This has now been fixed in v2.23.

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