TypeError: Cannot read property 'serial_number' of undefined at Request._callback (/opt/node_apps/echelon-v3/echelon-v3-migration/plugins/software_downloads/index.js:137:88) at Request.self.callback (/opt/node_apps/echelon-v3/echelon-v3-migration/node_modules/request/request.js:186:22) at emitTwo (events.js:126:13) at Request.emit (events.js:214:7) at Request. (/opt/node_apps/echelon-v3/echelon-v3-migration/node_modules/request/request.js:1163:10) at emitOne (events.js:116:13) at Request.emit (events.js:211:7) at IncomingMessage. (/opt/node_apps/echelon-v3/echelon-v3-migration/node_modules/request/request.js:1085:12) at Object.onceWrapper (events.js:313:30) at emitNone (events.js:111:20) at IncomingMessage.emit (events.js:208:7) at endReadableNT (_stream_readable.js:1064:12) at args.(anonymous function) (/opt/node/lib/node_modules/pm2/node_modules/event-loop-inspector/index.js:138:29) at _combinedTickCallback (internal/process/next_tick.js:139:11) at process._tickDomainCallback (internal/process/next_tick.js:219:9)