GraphicsMagick : Issue while writing image to disk in UNIX

Question

I have developed a project in NODE.js which used GraphicsMagick in processing my image and that image whould be sent to wider audience via mail.

This is working as expected in Windows. But when the code is migrated to UNIX server, I see below error when GM is trying to write the image to disk.

Error: Command failed: gm convert: Request did not return an image

Can some one help me in getting this fixed.

Thanks. P S: I already read out a few questions in Stack overflow and Google. But they couldn't help me out in getting this resolved.