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Editorial Team
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Asked: 2026-05-25T14:38:45+00:00

I deployed my symfony 1.4 project from my local machine (Windows 7) to my

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I deployed my symfony 1.4 project from my local machine (Windows 7) to my test server (Linux Ubuntu Server).
Whenever I open this project through my browser (IE, FF…) I get an Error 500 which is most certainly caused due to an error which I get from the log/frontend_staging:

"symfony [err] {InvalidArgumentException} Unable to load "I18nHelper.php" helper in: SF_ROOT_DIR/apps/frontend/lib/helper, SF_ROOT_DIR/lib/helper, SF_ROOT_DIR/lib/vendor/symfony/lib/helper."

The File I18NHelper.php is located in SF_ROOT_DIR/lib/vendor/symfony/lib/helper, so I don’t see a problem there. I already played with the naming, though some people mentioned they had trouble with the uppercase N in the Helpers name on Unix systems, but this didn´t solve my problem at all.

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1 Answer

  1. Editorial Team

    It’s a very nasty little thing:

    Use <?php use_helper('I18N'); ?> instead of <?php use_helper('I18n'); ?> (Mind the upper case of the last ‘n’).

    Linux is case-sensitive, unlike Windows.

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