try{
        ....
        ....
        ....

        Set tSC = method_invocation()

        If $$$ISERR(tSC) {
            Quit tSC
        }

        ....
        ....
        ....

}

On compiling the above, I get an error saying "QUIT argument not allowed : 'tSC' ".

• When I replace Quit tSC with Return tSC, it compiles
• On replacing Quit tSC with Quit $$$OK, I get the error: QUIT argument not allowed : '1'
• On replacing Quit tSC with Quit, it compiles
• A 'Quit tSC' statement outside of the try-catch block does not cause a compile-time error.

The reason this happens is because a 'Quit' inside a try-catch block causes control to be passed to the code immediately outside the try catch block instead of quitting the function and returning a value.

Sharing this here because it took me a while to realize what was happening (and although something related is briefly mentioned in the try-catch docs, I could only find it after I realized that the problem was related to try-catch)