Upon compiling a map I had started making, I get the message " script runtime error " " unknown item 'fraggrenade' " followed by a black screen with a cursor stuck in the middle. I've looked at some of the other posts on this error and had a hard time understanding how to solve the issue. I just started making maps today; I have very limited knowledge when it comes to the scripts and programs related. Any help would be appreciated.

Upon compiling a map I had started making, I get the message " script runtime error " " unknown item 'fraggrenade' " followed by a black screen with a cursor stuck in the middle. I've looked at some of the other posts on this error and had a hard time understanding how to solve the issue. I just started making maps today; I have very limited knowledge when it comes to the scripts and programs related. Any help would be appreciated.

Is this still going on?
Otherwise you have to turnoff develop mode to play your map. 

Fixed the error, all good now.