From 3df5c1333f7687ba5e8d70984948bf21561263f1 Mon Sep 17 00:00:00 2001
From: Gord Stephen <gord.stephen@nrel.gov>
Date: Tue, 4 Nov 2025 09:54:45 -0700
Subject: [PATCH 1/2] Return zero NEUE when a region's demand is zero

---
 PRASCore.jl/src/Results/Shortfall.jl        | 25 ++++++++++++++++--
 PRASCore.jl/src/Results/ShortfallSamples.jl | 29 ++++++++++++++++++---
 2 files changed, 48 insertions(+), 6 deletions(-)

diff --git a/PRASCore.jl/src/Results/Shortfall.jl b/PRASCore.jl/src/Results/Shortfall.jl
index 0070b39b..0b00d7d2 100644
--- a/PRASCore.jl/src/Results/Shortfall.jl
+++ b/PRASCore.jl/src/Results/Shortfall.jl
@@ -263,12 +263,33 @@ EUE(x::ShortfallResult{N,L,T,E}, r::AbstractString, t::ZonedDateTime) where {N,L
     EUE{1,L,T,E}(MeanEstimate(x[r, t]..., x.nsamples))
 
 function NEUE(x::ShortfallResult)  
-    return NEUE(div(MeanEstimate(x[]..., x.nsamples),(sum(x.regions.load)/1e6)))
+
+    demand = sum(x.regions.load)
+
+    estimate = if demand > 0
+        div(MeanEstimate(x[]..., x.nsamples), demand/1e6)
+    else
+        MeanEstimate(0.)
+    end
+
+    return NEUE(estimate)
+
 end
 
 function NEUE(x::ShortfallResult, r::AbstractString) 
+
     i_r = findfirstunique(x.regions.names, r)
-    return NEUE(div(MeanEstimate(x[r]..., x.nsamples),(sum(x.regions.load[i_r,:])/1e6)))
+
+    demand = sum(x.regions.load[i_r, :])
+
+    estimate = if demand > 0
+        div(MeanEstimate(x[r]..., x.nsamples), demand/1e6)
+    else
+        MeanEstimate(0.)
+    end
+
+    return NEUE(estimate)
+
 end
 
 function finalize(
diff --git a/PRASCore.jl/src/Results/ShortfallSamples.jl b/PRASCore.jl/src/Results/ShortfallSamples.jl
index bddca0f6..99106433 100644
--- a/PRASCore.jl/src/Results/ShortfallSamples.jl
+++ b/PRASCore.jl/src/Results/ShortfallSamples.jl
@@ -155,13 +155,34 @@ EUE(x::ShortfallSamplesResult{N,L,T,P,E}, t::ZonedDateTime) where {N,L,T,P,E} =
 EUE(x::ShortfallSamplesResult{N,L,T,P,E}, r::AbstractString, t::ZonedDateTime) where {N,L,T,P,E} =
     EUE{1,L,T,E}(MeanEstimate(x[r, t]))
 
-function NEUE(x::ShortfallSamplesResult{N,L,T,P,E}) where {N,L,T,P,E}
-    return NEUE(div(MeanEstimate(x[]),(sum(x.regions.load)/1e6)))
+function NEUE(x::ShortfallSamplesResult)
+
+    demand = sum(x.regions.load)
+
+    estimate = if demand > 0
+        div(MeanEstimate(x[]), demand/1e6)
+    else
+        MeanEstimate(0.)
+    end
+
+    return NEUE(estimate)
+
 end
 
-function NEUE(x::ShortfallSamplesResult{N,L,T,P,E}, r::AbstractString) where {N,L,T,P,E}
+function NEUE(x::ShortfallSamplesResult, r::AbstractString)
+
     i_r = findfirstunique(x.regions.names, r)
-    return NEUE(div(MeanEstimate(x[r]),(sum(x.regions.load[i_r,:])/1e6)))
+
+    demand = sum(x.regions.load[i_r, :])
+
+    estimate = if demand > 0
+        div(MeanEstimate(x[r]), demand/1e6)
+    else
+        MeanEstimate(0.)
+    end
+
+    return NEUE(estimate)
+
 end
 
 function finalize(

From e2182b53aeecf86b0472c3c410ece1c70eecdda0 Mon Sep 17 00:00:00 2001
From: Gord Stephen <gord.stephen@nrel.gov>
Date: Tue, 4 Nov 2025 11:55:06 -0700
Subject: [PATCH 2/2] Increment PRASCore version to v0.8.1

---
 PRASCore.jl/Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PRASCore.jl/Project.toml b/PRASCore.jl/Project.toml
index 1af73c1c..7edaec3f 100644
--- a/PRASCore.jl/Project.toml
+++ b/PRASCore.jl/Project.toml
@@ -6,7 +6,7 @@ authors = [
     "Srihari Sundar <Hari.Sundar@nrel.gov>",
     "Julian Florez <Julian.Florez@nrel.gov"
 ]
-version = "0.8.0"
+version = "0.8.1"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"