diff --git a/.github/workflows/Java_CI.yaml b/.github/workflows/Java_CI.yaml
index 229adaf..e8a0893 100644
--- a/.github/workflows/Java_CI.yaml
+++ b/.github/workflows/Java_CI.yaml
@@ -31,6 +31,13 @@ jobs:
           distribution: 'temurin'
           cache: 'gradle'
 
+      - name: Ensure old Lookup library is not resolved
+        shell: bash
+        run: |
+          ./gradlew -PcvmUserId="dwr-wrims-build" -PcvmPassword="${{ secrets.WRIMS_ENGINE_DEPENDENCIES_TOKEN }}" \
+            :wrims-core:dependencyInsight --dependency lookup --configuration runtimeClasspath \
+            | grep -qE "^mil\.army\.usace\.hec:lookup:[^:\s]+$" && exit 1 || exit 0
+
       - name: Build with Gradle
         run: |
           ./gradlew clean -PcvmUserId="dwr-wrims-build" -PcvmPassword="${{ secrets.WRIMS_ENGINE_DEPENDENCIES_TOKEN }}"
diff --git a/build.gradle b/build.gradle
index b2791bb..14e59cd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -34,4 +34,12 @@ tasks.register('copyDependencies', Copy) {
 allprojects {
     group = 'gov.ca.water'
     version = versionLabel(versionDetails())
+
+    // JDK 21+ resolution for Lookup library bug: Issue #194
+    configurations.configureEach {
+        resolutionStrategy.dependencySubstitution {substitution ->
+            substitution.substitute(module("mil.army.usace.hec:lookup")).using(module(libs.lookup.compat.get().toString()))
+                    .because("WRIMS uses upstream NetBeans Lookup for Java 21 Compatibility.")
+        }
+    }
 }
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index fef86ec..b29a43b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -2,6 +2,7 @@
 hec-monolith = "6.0.0"
 #dssgui is not used by wrims-engine, but is is being included in the wrims-engine bom and should be kept in sync with hec-monolith for downstream projects.
 dssgui = "3.4.18"
+lookup = "4.0.0"
 guava = "33.4.8-jre"
 commons-io = "2.1"
 xstream = "1.4.3"
@@ -36,6 +37,7 @@ azure-storage-blob = "12.28.0"
 hec-monolith = { module = "mil.army.usace.hec:hec-monolith", version.ref = "hec-monolith" }
 hec-monolith-bom = { module = "mil.army.usace.hec:hec-monolith-bom", version.ref = "hec-monolith" }
 dssgui = { module = "mil.army.usace.hec:dssgui", version.ref = "dssgui" }
+lookup-compat = { module = "mil.army.usace.hec:lookup-compat", version.ref = "lookup" }
 guava = { module = "com.google.guava:guava", version.ref = "guava" }
 commons-io = { module = "commons-io:commons-io", version.ref = "commons-io" }
 xstream = { module = "com.thoughtworks.xstream:xstream", version.ref = "xstream" }
diff --git a/wrims-comparison-test/README.md b/wrims-comparison-test/README.md
index 8564b24..b914a2a 100644
--- a/wrims-comparison-test/README.md
+++ b/wrims-comparison-test/README.md
@@ -102,16 +102,16 @@ From repository root (where `gradlew.bat` resides):
 
 - Run only the Azure Cucumber suite:
 ```
-./gradlew.bat :wrims-engine:wrims-comparison-test:runAzureCucumberTests
+./gradlew.bat :wrims-comparison-test:runAzureCucumberTests
 ```
 - Ensure `.env.cucumber` exists or pass a token explicitly, e.g.:
 ```
-./gradlew.bat :wrims-engine:wrims-comparison-test:runAzureCucumberTests -Dwrims.azure.sas="sv=...&sig=..."
+./gradlew.bat :wrims-comparison-test:runAzureCucumberTests -Dwrims.azure.sas="sv=...&sig=..."
 ```
 
 - Generate compute and comparison report locally (CalLite example):
 ```
-./gradlew.bat :wrims-engine:wrims-comparison-test:testReport
+./gradlew.bat :wrims-comparison-test:testReport
 ```
 - Outputs:
     - `wrims-engine/wrims-comparison-test/build/testProjects/Callite_update_compare_6_6.pdf`
@@ -119,7 +119,7 @@ From repository root (where `gradlew.bat` resides):
 
 - Clear temporary extracted projects:
 ```
-./gradlew.bat :wrims-engine:wrims-comparison-test:clear-tmp-projects
+./gradlew.bat :wrims-comparison-test:clear-tmp-projects
 ```
 
 ---