Dave
I think LogixNG would work here. I tried putting a dummy block in between that was constantly occupied but that did not work unsurprisingly.
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But I'm confused about your third option. I'm already not telling JMRI that a gap exists. As far as it knows the two monitored blocks are abutting even though physically they are not. It's just that block A goes dark before block B lights up.?
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Thanks for the help.
George
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George Hofmann