Default [Q] E:unknown volume for path[\sdcard]

Hello Moderators,

Am stuck and irritated with issue iam facing so far.When ever i try to install custom ROM i get an error message stating E:unknown volume for path[\sdcard].

Searched for many resolutions for above problem. Created CWR mode as instructed . wiped Cache, Wiped user Data, but i don't find option Dalvik Cache. when i proceed to install updates from SD card i get an error message stating E:unknown volume for path[\sdcard].Any where on globe i haven't found a solution for the problem mentioned.

Got Damn bored with existing samsung software some one please help me with this.