Error processing image.

Error: Error processing image.
    at /var/www/ehon.dh-jac.net/mongaku/build/logic/uploads.js:49:23
    at /var/www/ehon.dh-jac.net/mongaku/build/schemas/UploadImage.js:130:16
    at /var/www/ehon.dh-jac.net/mongaku/build/schemas/Image.js:590:7
    at /var/www/ehon.dh-jac.net/mongaku/node_modules/async/dist/async.js:3888:9
    at /var/www/ehon.dh-jac.net/mongaku/node_modules/async/dist/async.js:473:16
    at iterateeCallback (/var/www/ehon.dh-jac.net/mongaku/node_modules/async/dist/async.js:988:17)
    at /var/www/ehon.dh-jac.net/mongaku/node_modules/async/dist/async.js:969:16
    at /var/www/ehon.dh-jac.net/mongaku/node_modules/async/dist/async.js:3885:13
    at PassThrough.<anonymous> (/var/www/ehon.dh-jac.net/mongaku/build/schemas/Image.js:492:7)
    at emitOne (events.js:116:13)
    at PassThrough.emit (events.js:211:7)
    at callback (/var/www/ehon.dh-jac.net/mongaku/node_modules/gm/lib/command.js:127:32)
    at /var/www/ehon.dh-jac.net/mongaku/node_modules/gm/lib/command.js:139:23
    at next (/var/www/ehon.dh-jac.net/mongaku/node_modules/array-series/index.js:30:11)
    at gm.<anonymous> (/var/www/ehon.dh-jac.net/mongaku/node_modules/gm/lib/convenience/autoOrient.js:34:25)
    at emitMany (events.js:147:13)