Unhandled 'error' event

[bala-drg]

i'm getting the below error after i ran the gulp command.

events.js:141
throw er; // Unhandled 'error' event
^
ReferenceError: show_version is not defined
at eval (lodash.templateSources[2]:12:6)
at DestroyableTransform._transform (/Applications/testproject1/node_modules/gulp-template/index.js:21:40)
at DestroyableTransform.Transform._read (/Applications/testproject1/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:159:10)
at DestroyableTransform.Transform._write (/Applications/testproject1/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:147:83)
at doWrite (/Applications/testproject1/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:313:64)
at writeOrBuffer (/Applications/testproject1/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:302:5)
at DestroyableTransform.Writable.write (/Applications/testproject1/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:241:11)
at write (/Applications/testproject1/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:623:24)
at flow (/Applications/testproject1/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:632:7)
at DestroyableTransform.pipeOnReadable (/Applications/testproject1/node_modules/vinyl-fs/node_modules/readable-stream/lib/_stream_readable.js:664:5)