Try to do if a block errors

Try to do if a block errors
Block Type	C
Category / Extension	Control Extension

The try to do if a block errors block is a block that behaves like the If then... else if then... block, expect it works in another ways. The script in the first section plays like normally, but once an error happens, that script is cancelled and the second section happens. There dosen't seem to be a workaround yet.