In annotator.php:185 - change to exec and after unlinking of filetoconvert if return value of exec is false throw exception saying PDF conversion using Imagemagick failed.
Add lang string for the imagemagick exception .
In upload.php:84 - change to exec and modify the exception handling.
In annotator.php:185 - change to exec and after unlinking of filetoconvert if return value of exec is false throw exception saying PDF conversion using Imagemagick failed. Add lang string for the imagemagick exception . In upload.php:84 - change to exec and modify the exception handling.