How to continue SKILL execution by diverting stderr to a file?

errset is the key.

procedure(errChk()
    let((redirectPort)
        redirectPort=outfile("./error.txt")
        when(redirectPort
            let(((errport redirectPort))
                errset(
                    foreach(elm list(1 "1" list(1) )
                        printf("%f" elm) )
                    t
                )
                printf("Program execution completed\n")
            )
            close(redirectPort)
        )
    )
)

In this case, I'm wrapping the entire foreach in errset, and so it traps the error (the t as second argument tells it to print the error message still). The errport is redirected to a file - doing it with a let like this takes advantage of SKILL's dynamic scoping, and makes it "safe" because as the program unwinds, errport gets restored.

If I move the errset to be around the printf, say:

procedure(errChk()
    let((redirectPort)
        redirectPort=outfile("./error.txt")
        when(redirectPort
            let(((errport redirectPort))
        foreach(elm list(1 "1" list(1) )
            errset(
                        printf("%f" elm)
            t
            )
        )
                printf("Program execution completed\n")
            )
            close(redirectPort)
        )
    )
)

Then error.chk will now have three errors in it.

Hope that helps!

Regards,

Andrew.

 Hi Andrew,

This works great!

Thanks a lot.

Best regards,

Bhupendra