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Paul,

I have reviewed your upload.

Block 1 includes track segments attached to the connection points on the slip.? The subsequent anchor points create block boundaries.

SSL requires signal heads at anchor point block boundaries.? You do not have the required signal heads at the block boundary anchor points which results in the error messages.

The simple fix is to change the block assignments for the track segments to match the neighbor track segments.? This eliminates the block boundaries.

Note: ?Signals are used to protect entry into points of conflict.? These are normally turnouts and level crossings (diamonds).? There is rarely any requirement to protect the exit from a turnout or level crossing.? You don't want to enter if you cannot exit.

Dave Sand

----- Original message -----

From: Dave Sand <ds@...>

To: "[email protected]" <[email protected]>

Subject: Re: [jmriusers] Adding Signal Heads @ Dbl Slip using "Set Signal Heads at a Slip" Tool #ssl #layouteditor

Date: Friday, March 14, 2025 4:04 PM

Paul,

My understanding is that the message occurs when it is not possible to find a "next" signal head to be protected.

If you upload the layout data xml file to the group's ProblemsBeingWorkedOn file folder, it might be possible to identify the issue.

Dave Sand

----- Original message -----

From: "Paul Young via " <windscape360=[email protected]>

To:?[email protected]

Subject: [jmriusers] Adding Signal Heads @ Dbl Slip using "Set Signal Heads at a Slip" Tool #ssl #layouteditor

Date: Thursday, March 13, 2025 6:51 PM

Good evening Moderators and group:

?

My setup:

Win10, Digitrax PR3

Digitrax DCS210, DCS50 (throttle/ booster only), DT400, DT500

SE8C x2, BDL16 x2, SE74 x2, DS64 x4, UR90 x2, UP5

Signals are Digitrax SHABC and SH2AB

Panel Pro 5.2+R760b98537f, java 11.0.19

?

The layout is essentially a reversing loop to reversing loop arrangement, with SSL installed over most of the layout and working correctly.

I have a Layout Editor panel which correctly displays occupancy, powered turnout positions and signal aspects and correctly match what is displayed on the physical layout.

?

There is 1 powered double slip that I am now trying to add SSL to using the "Set Signal Heads at a Slip" Tool.

I used an earlier post by Dave Sand as a guide ... #233359.

However, I get the following error:

"Cannot set up logic because next signal (in or at the end of block "Block_1" is apparently not yet defined"

There are 4 block boundaries defined (the slip is part of Block_1 as well), and signal heads at all of these boundaries.

If I try to "Set Signal Heads at a Block Boundary", I get an error message that the signal heads in question are already in use on the layout diagram.

?

I placed most of the signal heads on the layout diagram and created the SSL without using the "Set Signal Heads at a Block Boundary" or other tools ... could this be part of my difficulty? Perhaps it's time to move to SML?

I would be grateful for any suggestions as to how to proceed from here.

Thank you all,

Paul Young