Error When upload image.

Failed2: phpThumb() v1.7.9-200805132119 "" does not exist phpThumb() v1.7.9-200805132119 in file "phpthumb.class.php" on line 216 setSourceFilename(/home/xxxxxxxx/public_html/xxxxxx/components/com_flexicontent/uploads/dock.jpg) set $this->sourceFilename to "/home/xxxxxx/public_html/xxxxxx/components/com_flexicontent/uploads/dock.jpg" in file "phpthumb.class.php" on line 243 file_exists() = 0 in file "phpthumb.class.php" on line 1105 is_executable() = 0 in file "phpthumb.class.php" on line 1106 ImageMagickThumbnailToGD() aborting because cannot find convert in $this->config_imagemagick_path (), and `which convert` returned (which: no convert in (/bin:/usr/bin)) in file "phpthumb.class.php" on line 1135 $AvailableImageOutputFormats = array(text;ico;bmp;wbmp;gif;png;jpeg) in file "phpthumb.class.php" on line 888 $this->thumbnailFormat set to $this->config_output_format "jpeg" in file "phpthumb.class.php" on line 899 $this->thumbnailQuality set to "99" in file "phpthumb.class.php" on line 916 !$this->config_allow_src_above_docroot therefore setting "/home/xxxxx/public_html/master/components/com_flexicontent/uploads/dock.jpg" (outside "/home/xxxxxxxxx/public_html/designers") to null in file "phpthumb.class.php" on line 1070 $this->sourceFilename set to "" in file "phpthumb.class.php" on line 817 phpThumb() v1.7.9-200805132119 "" does not exist in file "phpthumb.class.php" on line 3709 setCacheDirectory() starting with config_cache_directory = "" in file "phpthumb.class.php" on line 923 $this->config_cache_directory () is not a directory in file "phpthumb.class.php" on line 959 SetCacheFilename() failed because $this->config_cache_directory is empty in file "phpthumb.class.php" on line 3076 starting ExtractEXIFgetImageSize() in file "phpthumb.class.php" on line 2920 skipping GetImageSize() because $this->sourceFilename is empty in file "phpthumb.class.php" on line 2932 GetImageSize("") failed in file "phpthumb.class.php" on line 2959 $this->useRawIMoutput=true after checking $UnAllowedParameters in file "phpthumb.class.php" on line 1252 ImageMagickThumbnailToGD() aborting because $this->sourceFilename is empty in file "phpthumb.class.php" on line 1295 ImageMagickThumbnailToGD() failed in file "phpthumb.class.php" on line 2966 SetOrientationDependantWidthHeight() starting with ""x"" in file "phpthumb.class.php" on line 2899 SetOrientationDependantWidthHeight() setting w="600", h="600" in file "phpthumb.class.php" on line 2915 exif_thumbnail() does not exist, cannot extract EXIF thumbnail in file "phpthumb.class.php" on line 3010 EXIF thumbnail extraction: (size=0; type=""; 0x0) in file "phpthumb.class.php" on line 3015 starting SourceImageToGD() in file "phpthumb.class.php" on line 3273 $this->useRawIMoutput=true after checking $UnAllowedParameters in file "phpthumb.class.php" on line 1252 ImageMagickThumbnailToGD() aborting because $this->sourceFilename is empty in file "phpthumb.class.php" on line 1295 Not using EXIF thumbnail data because $this->exif_thumbnail_data is empty in file "phpthumb.class.php" on line 3329 $this->gdimg_source is still empty in file "phpthumb.class.php" on line 3381 ImageMagickThumbnailToGD() failed in file "phpthumb.class.php" on line 3383 phpThumb() v1.7.9-200805132119 Unable to create image, neither filename nor image data suppplied in SourceImageToGD() [3490] in file "phpthumb.class.php" on line 3709 SourceImageToGD() failed in file "phpthumb.class.php" on line 323