diff --git a/R/Execution.R b/R/Execution.R
index 5faf731..ad6272c 100644
--- a/R/Execution.R
+++ b/R/Execution.R
@@ -157,6 +157,10 @@ execute <- function(analysisSpecifications,
   executionStatus <- list()
 
   # Execute the cohort generator module first if it exists
+  # If cohort generation fails for any reason, update the
+  # cohortGenerationSuccessful flag to FALSE so that subsequent
+  # modules are skipped
+  cohortGenerationSuccessful <- TRUE
   for (i in 1:length(analysisSpecifications$moduleSpecifications)) {
     moduleName <- analysisSpecifications$moduleSpecifications[[i]]$module
     if (tolower(moduleName) == "cohortgeneratormodule") {
@@ -166,6 +170,9 @@ execute <- function(analysisSpecifications,
         analysisSpecifications = analysisSpecifications,
         executionSettings = executionSettings
       )
+      # The absence of an error in moduleExecutionStatus$error
+      # represents a success
+      cohortGenerationSuccessful <- ifelse(moduleExecutionStatus[[1]]$status == "SUCCESS", TRUE, FALSE)
       executionStatus <- append(
         executionStatus,
         moduleExecutionStatus
@@ -182,8 +189,14 @@ execute <- function(analysisSpecifications,
         moduleName = moduleName,
         connectionDetails = connectionDetails,
         analysisSpecifications = analysisSpecifications,
-        executionSettings = executionSettings
+        executionSettings = executionSettings,
+        skipExecution = !cohortGenerationSuccessful
+      )
+      executionStatus <- append(
+        executionStatus,
+        moduleExecutionStatus
       )
+    } else {
       executionStatus <- append(
         executionStatus,
         moduleExecutionStatus
@@ -194,39 +207,65 @@ execute <- function(analysisSpecifications,
   # Print a summary
   cli::cli_h1("EXECUTION SUMMARY")
   for (i in 1:length(executionStatus)) {
-    status <- executionStatus[[i]]
-    errorMessage <- ifelse(!is.null(status$result$error), status$result$error, "")
-    statusMessage <- sprintf("%s %s (Execution Time: %s)", status$moduleName, errorMessage, status$executionTime)
-    if (!is.null(status$result$error)) {
-      cli::cli_alert_danger(statusMessage)
+    moduleStatus <- executionStatus[[i]]
+    errorMessage <- ifelse(moduleStatus$status == "SUCCESS", "", moduleStatus$errorMessage)
+    moduleStatusMessage <- sprintf("%s %s (Execution Time: %s)", moduleStatus$moduleName, errorMessage, moduleStatus$executionTime)
+    if (moduleStatus$status == "FAILED") {
+      cli::cli_alert_danger(moduleStatusMessage)
+    } else if (moduleStatus$status == "SKIPPED") {
+      cli::cli_alert_warning(moduleStatusMessage)
     } else {
-      cli::cli_alert_success(statusMessage)
+      cli::cli_alert_success(moduleStatusMessage)
     }
   }
 
   invisible(executionStatus)
 }
 
-.executeModule <- function(moduleName, connectionDetails, analysisSpecifications, executionSettings) {
-  moduleObject <- get(moduleName)$new()
-  safeExec <- purrr::safely(moduleObject$execute)
-  startTime <- Sys.time()
-  executionResult <- safeExec(
-    connectionDetails = connectionDetails,
-    analysisSpecifications = analysisSpecifications,
-    executionSettings = executionSettings
-  )
-  timeToExecute <- Sys.time() - startTime
-  # Emit any errors
-  if (!is.null(executionResult$error)) {
-    .printErrorMessage(executionResult$error$message)
+.executeModule <- function(moduleName, connectionDetails, analysisSpecifications, executionSettings, skipExecution = FALSE) {
+  if (isFALSE(skipExecution)) {
+    moduleObject <- get(moduleName)$new()
+    safeExec <- purrr::safely(moduleObject$execute)
+    startTime <- Sys.time()
+    executionResult <- safeExec(
+      connectionDetails = connectionDetails,
+      analysisSpecifications = analysisSpecifications,
+      executionSettings = executionSettings
+    )
+    timeToExecute <- Sys.time() - startTime
+    # Emit any errors
+    status <- ifelse(is.null(executionResult$error), "SUCCESS", "FAILED")
+    if (status == "FAILED") {
+      .printErrorMessage(executionResult$error$message)
+    }
+    return(
+      .createModuleExecutionStatus(
+        moduleName = moduleName,
+        status = status,
+        errorMessage = executionResult$error$message,
+        executionTime = paste0(signif(timeToExecute, 3), " ", attr(timeToExecute, "units"))
+      )
+    )
+  } else {
+    return(
+      .createModuleExecutionStatus(
+        moduleName = moduleName,
+        status = "SKIPPED",
+        errorMessage = "Cohort generation failed",
+        executionTime = "SKIPPED"
+      )
+    )
   }
+}
+
+.createModuleExecutionStatus <- function(moduleName, status, errorMessage, executionTime) {
   return(
     list(
       list(
         moduleName = moduleName,
-        result = executionResult,
-        executionTime = paste0(signif(timeToExecute, 3), " ", attr(timeToExecute, "units"))
+        status = status,
+        errorMessage = errorMessage,
+        executionTime = executionTime
       )
     )
   )
diff --git a/tests/testthat/test-Execution.R b/tests/testthat/test-Execution.R
index 3a4ad6a..064eb31 100644
--- a/tests/testthat/test-Execution.R
+++ b/tests/testthat/test-Execution.R
@@ -283,3 +283,41 @@ test_that("Specify subset of modules to run", {
 
   expect_true(all(modulesExecuted %in% modulesToExecute))
 })
+
+test_that("Stop if error occurs during cohort generation", {
+  analysisSpecifications <- ParallelLogger::loadSettingsFromJson(
+    fileName = system.file("testdata/cdmModulesAnalysisSpecifications.json",
+      package = "Strategus"
+    )
+  )
+  # Add an ill-formed Circe expression to break the cohort generation process
+  analysisSpecifications$sharedResources[[1]]$cohortDefinitions[[6]] <- list(
+    cohortId = 6,
+    cohortName = "Failure",
+    cohortDefinition = "{}"
+  )
+
+  executionSettings <- createCdmExecutionSettings(
+    workDatabaseSchema = workDatabaseSchema,
+    cdmDatabaseSchema = cdmDatabaseSchema,
+    cohortTableNames = CohortGenerator::getCohortTableNames(cohortTable = "unit_test"),
+    workFolder = file.path(tempDir, "work_folder"),
+    resultsFolder = file.path(tempDir, "results_folder")
+  )
+
+  output <- Strategus::execute(
+    connectionDetails = connectionDetails,
+    analysisSpecifications = analysisSpecifications,
+    executionSettings = executionSettings
+  )
+
+  # Verify cohort generator failed
+  cohortGeneratorStatus <- sapply(output, function(x) if (x$moduleName == "CohortGeneratorModule") x$status)
+  cohortGeneratorStatus <- unlist(cohortGeneratorStatus[-which(sapply(cohortGeneratorStatus, is.null))])
+  expect_true(cohortGeneratorStatus == "FAILED")
+
+  # Verify all other modules were skipped
+  allOtherModuleStatuses <- sapply(output, function(x) if (x$moduleName != "CohortGeneratorModule") x$status)
+  allOtherModuleStatuses <- unlist(allOtherModuleStatuses)
+  expect_true(all(allOtherModuleStatuses == "SKIPPED"))
+})