maxSize = popPS()
addr = popPS()
+ if !(fid in keys(openFiles))
+ error(string("Invalid FID ", fid, "."))
+ end
+
fh = openFiles[fid]
line = readline(fh, chomp=false)
jmp = callPrim(jmp)
catch ex
+ println(string("Error in primitive '", getPrimName(jmp), "' at address ", jmp))
showerror(STDOUT, ex)
println()