Command: gs -dNOPAUSE -dBATCH -sDEVICE=jpeg -r350 -dJPEGQ=98 -dUseCropBox -dPDFFitPage -dColorImageResolution=350 -dGrayImageResolution=350 -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile="/volume1/web/homecare/data/cache/ebook_images/siheung_01_3/page_%04d.jpg" "/volume1/web/homecare/data/file/siheung_01/8e3587838b2f05b2ab81f9cf5d2a9a07_f1lOSIxv_0f35044819396273bd1ad74529a4b8bd8f26f0fc.pdf" 2>&1 Return code: 127 Output: sh: gs: command not found Cache subdir: /volume1/web/homecare/data/cache/ebook_images/siheung_01_3 Glob pattern: /volume1/web/homecare/data/cache/ebook_images/siheung_01_3/page_*.jpg Files found: 0