TYPO3 Exception 1395614959

Note

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Version number in composer manifest of package "..." is missing or invalid

This happens in TYPO3 6.2 whenever an extension has a dependency on another extension which contains a file composer.json without any version number (which is actually the best practice).

Simple solution for the time being since composer is not properly supported in TYPO3 6.2 is to delete the corresponding file composer.json or to explicitly set a version number.